2. Humans aren't the only horny members of the animal kingdom doing it just for fun. Dolphins and a type of chimpanzee called the bonobo have also been observed engaging in sexual activity when they are not in their natural reproductive cycles.
3. While Viagra has made erectile dysfunction (affecting 10 to 12 percent of men) a household phrase, the opposite problem -- premature ejaculation -- is more common (affecting 24 to 27 percent of men). The U.S. Food and Drug Administration is currently reviewing a drug called dapoxetine as a cure for this problem.
4. Crank up that thermostat... orgasms may be more intense in warmer conditions. The degree of vasocongestion, reddening or darkeing of the skin known as the "sex flush," is both more common in warmer temperatures and an indication of how intense an orgasm may be.
5. If a woman experiences orgasm during sex, she is more likely to become pregnant, since orgasmic spasms in pelvic muscles help move sperm up the vaginal canal to the uterus.
6. Homosexuality is not unique to humans. Many species have been observed engaging in homosexual activity, and in fact male bats have the highest rate of homosexuality of all mammals.
7. On any given day 400,000,000 people around the world -- 1 in 17 of us -- will have sexual intercourse. Broken down further, 4,000 people are having sex at any given time.
8. Sex cures headaches. Endorphins released into our bloodstream when we have sex not only give us pleasure but also act as painkillers. Useful information to whip out the next time your partner uses a headache as a reason to say no.
9. Many elderly can and do have frequent sex. At age 70, 73% of males are still potent, and 30% of women 80 or older have still have sex.
10. 70% of women would rather eat choclate than have sex.
Sources: The Kinsey Report, Wikipedia, American Urology Association
1. 最经典的做爱时间大概在15分钟左右。包括了10-12分钟的前戏和5分钟的性爱。
2.人类不是唯一把做爱做的事当作娱乐的生物。事实上海豚和某种叫做Bonobo 的黑猩猩在不属于他们交配的季节，也会做这些事情。
3. 当10-12%的男性正为无法勃起而服用伟哥的同时，有更多的男人（大约24-27%）正在为早泄而发愁。美国食品药品管理机构正在加紧检验一种叫做dapoxetine 的新药，好尽快为这24%的男人解决问题。
4. 不仅仅是在做爱的时候男性会勃起，在某些温度稍高的场合。那话儿也会发生诸如充血、变红、膨胀等生理变化。由此可以看出男性那东西是十分敏感的。
5. 假如女方在做爱时变现得异常兴奋，那么这次她就有可能怀孕。因为兴奋导致的身体痉挛能使盆骨肌肉剧烈收缩从而帮助精子更快的抵达子宫。
6. 同性恋也并不是人类的专利。很多动物都有可能发生同性恋活动。雄性蝙蝠同性恋比率在所有动物中是最高的。
7. 每天全球40亿的人口，大约会有1/17的人会发生性爱关系。也就是说，每秒钟地球上都有4000人在做爱。
8. 做爱能够治疗头痛。做爱时人体分泌出的内啡肽不仅仅能给我们快感，也能减轻我们的疼痛。根据这点，当下一次你的爱人再因为头疼对你说不的时候，你就应该知道怎么做了。
9. 很多的老人也仍然具有性能力。大约73%的70岁老头和30%的80岁老太太仍然需要做爱。
10. 70%的女性比起性爱来说更喜欢吃巧克力。
原文:http://www.thedigitalbeat.com/2007/03/sex.html
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