1) Your Desire Is Often Related to Where you are in Your Menstrual
It's no coincidence that many women experience an increase in sexual desire around the time they ovulate. That's when testosterone levels are at their peak and, well, testosterone makes you frisky — just ask any guy. In fact, it's a pretty neat trick of biology that we would want sex right around the time we're most likely to get pregnant!

2) Women Can Ejaculate Too
Although it's a hotly debated issue, many women claim that before or during orgasm, they expel a fluid that's not urine and not vaginal lubrication. It's a clear, odorless fluid that comes out of the urethra itself (or its surrounding ducts) and can range from a few drops to a flood. “It can happen as a result of G-spot stimulation,” says Amy Levine, sex coach and founder of igniteyourpleasure.com. “It can take practice and a sense of letting go to have this experience, don't fret if you aren't able to do it,” she reassures. But, don't be alarmed if happens either.

3) Your Parts Might Not to Fit
He's the keymaster and you're the gatekeeper…but in reality, that's not always a combination that works. “It's like putting two puzzle pieces into place,” says Levine. If your guy is too big, all is not lost. Try a position where you control the depth of penetration, such as woman-on-top. If he's too small, then it's time to invest in some toys and hope that he's a good conversationalist.

4) The Left Side is Best for Female Pleasure
According to sex-workshop leaders Steve and Vera Bodansky, there's actually a specific area of the clitoris that's the most sensitive. “We've found, in every female student that we've taught, that the upper left quadrant of the clitoral head is the most pleasurable spot to touch,” they say in their book, Extended Massive Orgasm: How You Can Give and Receive Intense Sexual Pleasure. So tonight instruct him to go, “A little to the left, dear!”

5) Many Women Experience Post-Coital Bleeding
If you see red after intercourse, it doesn't necessarily mean you're getting your period…or that anything has ripped. You could be experiencing post-coital bleeding, a condition that can sometimes result from an infection of the cervix or a polyp. While most post-coital bleeding isn't life-threatening, you should still see your OB/GYN. Only he or she can tell if treatment is required.

6) Many Straight Guys Like Their Anal Areas Stimulated
If your man won't admit to wanting some back door action, it could be because he's afraid that it'll make him seem gay. “The reality is that the anal area is packed with nerves,” says Levine. She also says that stimulation of the prostate can lead to intense orgasms. If you decide to go exploring, just give him fair warning first!

7) Women Can Orgasm an Unlimited Amount of Times
After orgasm, men experience a refractory period during which they lose their erection. Women don't need the same recovery time. “Women have unlimited capacity,” says Britton. “Often they think that once they experience their first orgasm, that they are done. On the contrary, women have the ability to experience one orgasm after another.” Britton also points out that both genders can have multiple orgasms but that men must master specific techniques in order to do so. This means the man must understand his body enough to know when to decrease stimulation right before he ejaculates. Once he's achieved this, you've got a partner to ride the wave of successive orgasms with!

8) Sex Doesn't Slow Down for Many Elderly People
That Cialis commercial is no joke. Seniors don't spend all day getting reduced price tickets to the movies. Many of them are too busy going all the way! “Sexual attraction and connection is a life-long drive,” says Lou Paget, certified sex educator and author of The Big O: Orgasms: How to Have Them, Give Them, and Keep Them Coming. So if your sex life is a little lackluster, don't blame it on age. “For many older women the reason they aren't having sex is simply a matter of opportunity.” Make time for sex, and sex will happen.

9) Male sperm can live up to 5 days
Male sperm is surprisingly resilient. Sperm inside a woman's vagina can live in her cervical mucus or upper genital tract for 3-5 days. Provided the sperm remains alive, it may even be able to fertilise the egg, too. Sperm ejaculated outside the body is less tough – it can survive up to a few hours.

10) Lube Can Mean the Difference Between Pain and Pleasure
If you're not all that into sex, or find it painful, the answer to your problem could be in a small bottle you can pick up in any drugstore. Not producing enough lubrication can make sex downright un-fun for women. And needing a supplement doesn't mean you're not turned on. Don't be afraid to use it. “The truth is that our natural lubrication comes and goes throughout an encounter,” says Levine. “Wetter is better, and adding a water-based or silicone-based vagina-friendly lube can lead to an increased level of satisfaction.”

11) Most Women Don't Orgasm From Penetration Alone
You wouldn't expect a man to climax without his penis being involved, yet so many women feel pressure to orgasm without the clitoris. “We need clitoral stimulation,” says Levine. “After all, the sole purpose of the clitoris is for pleasure. During sex, stimulate your clit with a toy or your finger — or have your partner get in on the action.”

12) Having Sex Can Make You Look Sexier and more beautiful
When a woman does the deed, her estrogen levels double. This can make her hair shinier and her skin softer. “Estrogen seems to be the fountain of youth for women,” says Britton. “It can even keep the body enriched with more moisture in the walls of the vagina.” Think of sex as the ultimate beauty treatment and get them nice and often.

13) One Ejaculation Yields Only About a Teaspoon of Semen
You may want to keep this one secret from your man, especially if he thinks his love juice could fill up a quart every time he makes love. “Despite claims, the majority of men have about 1 to 2 teaspoons of ejaculation, maybe more if he hasn't orgasmed in quite some time,” says Paget. Still, we think you should applaud his efforts.

14) Humans and Dolphins are the Only Mammals That Have Sex Solely for Pleasure
Betcha didn't know that Flipper was such a playboy! The truth is, as humans, we can savor and enjoy sex and not just think of it for procreation purposes. Don't take this gift for granted and crank up the dial a little bit tonight — turn on some soft music, light a few candles and make like a dolphin.

15) Sex Can Lower Stress Levels and Keep You From Getting Sick
Did you know that when you're super busy, getting busy can be just the thing to keep you sane? That's because intercourse can lower blood pressure levels, making you less prone to stress. Regular sex can also give you higher levels of an antibody called immunoglobulin A, which helps ward off colds and other infections. So, in case you ever needed an excuse for nooky, there you go.

16) Strengthening the PC Muscle = Better Bladder Control and Better Sex
You do crunches for your abs, but when was the last time you did your Kegels? It's an exercise (similar to stopping the flow of urine when you're peeing) that tones the pubococcygeus muscle (or, the PC muscle). “The PC muscle can help with bladder control, but even better, it can make your orgasms more intense and help you grip his penis when he's inside of you, giving him more pleasure, too,” says Levine. So, why not squeeze this exercise into your schedule? The move: hold your PC muscle (like you were holding in urine) for 10 seconds, then release for 10 seconds. That's one. Repeat 10 times. For optimal Kegels, do 3 sets a day.

17) Sex Usually Lasts Less Than 10 Minutes
We've all seen those montages where a couple stays up all night doing it on every available surface, not stopping to eat or even take a bathroom break. But, in reality sex is usually not an all-night affair. There is nothing wrong with your love life! “If you want it to last longer, your guy needs to get in touch with his body to be able to slow down his arousal arc,” she says. “He can use techniques such as breath control to help him last longer.”

18) Falling Asleep After Sex Is Normal for Men and Women
There's a reason you and your honey feel tired after sex (and it's usually not because one of you doesn't feel like reciprocating). “After sex, oxytocin is released and that hormone is responsible for calming you and even inducing sleep,” says Patti Britton, PhD, clinical sexologist, founder of SexCoachU.com and author of The Art of Sex Coaching. Next time he dozes off, don't take it as a sign of boredom, but rather, that your lovin' is the ultimate stress-release!

19) There are Benefits to Having Sex during menstruation
Squeamish about sex during that time of the month? Don't be. When you climax, your uterus contracts, which can result in an immediate heavier flow, but then a shorter period since more of the blood and uterine lining have been shed. But even if it doesn't mean you get to buy a smaller box of tampons, “orgasms are a great way to relieve menstrual cramps,” says Levine.

20) Being on the Pill Can Dull Some Women's Libidos
The Pill once meant sexual freedom for women but nowadays more studies show that the suppression of ovulation, along with hormonal changes can actually dampen desire in some women. “Sometimes it's a matter of changing brands,” says Levine. “Or, going off the Pill altogether and trying another birth control method. Talk with your doctor to suss out your options,” she says.

21) Submissive Fantasies are Normal
If you dream of your boss taking you on the conference table (while you're dressed up as a naughty secretary) you're not alone. “Studies have shown that over 50 percent of women fantasize about being taken,” says Britton. Even the most powerful women may enjoy the submissive role during sex. “This might include being tied up or even forced into sex,” she says. Remember, fantasy and reality are two different realms and acknowledging these thoughts can actually be empowering.

22) Lack of sex can kill
If a female ferret doesn't mate while she's in heat, she can die! If she's unable to find a sex partner and stays in heat too long, her body will start to secrete high levels of estrogen, which causes aplastic anemia – a deadly disease for ferrets. Even in human beings, sex helps to reduce the risk of suffering from so many diseases such as breast cancer and prostate cancer (see below).

23) Sperms produced by 1 man in 2 weeks can impregnate the whole world
A fertile man ejaculates between 2 and 5 mililiters(ml) of semen (on average about a teaspoon). In each ml there are normally about 100 million sperms. If the concentration falls below 20 million sperm per mililiter there is usually some trouble with fertility. If A man is to have 1 round of sex each day –  which is normal, he produces between 200 million to half a billion sperms every day which adds up to 2.8 billion to 7 billion sperms in two weeks. Those sperms are enough to impregnate every woman on earth as the world has slightly above 3 billion women.

24) Sperms can be used as um, invisible ink
During World War I, members of the British Secret Intelligence Service (MI6) discovered you could use semen as invisible ink. Apparently, it didn't react with iodine vapour (the main method used to detect invisible ink) and, as a bonus, it was also readily available. They stopped using it once they realised that it began to smell if it wasn't, uh, fresh. Disturbing, but true!

25) Sperm contains calories!
While spitting or swallowing semen is always a matter of personal preference, if you're on a diet you may want to reconsider swallowing. Why? There are five calories in a teaspoon of semen. On the other hand, three teaspons of sperms contain equal calories with a single teaspoon of water.

26) Semen helps prevent tooth decay
Semen also contains zinc and calcium which helps prevent tooth decay. One typical ejaculation contains 150 mg of protein, 11 mg of carbohydrates, 6 mg fat, 3 mg cholesterol, 7% US RDA potassium and 3% US RDA copper and zinc. The protein content is roughly equivalent to that found in one egg white.

27) There's a reason why it's hard to urinate after sex
After you orgasm, your body releases an anti-diuretic hormone, which explains why you may have trouble urinating directly after sex. Stick with it though – going to the loo after sex helps to prevent urinary tract infections.

28) You can increase your boobs size by simply having sex
Ladies, forget push-up bras – just get frisky instead. A woman's breasts can swell up 25 per cent when she's aroused. And about one per cent of women are able to orgasm through the stimulation of their breasts and nipples alone. In simple terms: More sex equals bigger breasts.

29) Sex reduces risk of suffering from breast cancer
During arousal and orgasm, your levels of “happiness” hormones rise. Two of these—oxytocin and DHEA—may help keep breasts cancer free. One study showed that women who have sex more than once a month have a lower risk of developing breast cancer than those who are less sexually active. And Greek researchers found that men who had at least seven orgasms a month in their 50s had a significantly lower chance of developing male breast cancer.

30) Sex reduces risk of suffering from prostate cancer
Catholic priests have an elevated chance of dying of prostate cancer, and studies point to celibacy as a factor. In 2003, research on middle-aged Australian men found that those who averaged at least four ejaculations a week had a one-third lower chance of developing prostate cancer than those who had fewer. “When you drain the pipes, as it were, you have less clogging,” says Irwin Goldstein, MD, head of sexual medicine at Alvarado Hospital. Though the results of the study were clear, the reasons they occurred were not, says Goldstein, who calls for more research.

31) Have more sex to become more intelligent
Next time your other half says they're not in the mood for a romantic interlude, try telling them that it could make them more intelligent. Although it sounds like a clever ploy, psychologists say that making love can boost intelligence. That’s in addition to previous research which shows that sex not only helps to decrease your stress levels but also burns up calories.The latest research, conducted on mice, found that love-making greatly increased the creation of neurons located within the hippocampus, an area of the brain that is responsible for the formation of long-term memory. And stopping the mice from having sex led to a fall-off in their intelligence, the psychologists from the University of Maryland were quoted as saying.

ALSO READ: 25 diseases and medical conditions that can be cured by simply having sex

AND: 25 shocking incidents of people who died during sex


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