10.Why do you do it?

　　Sure, there's the obvious. But there's also an argument for men's biological drive to perpetuate their genes: An 18th-century Russian woman holds the world record for having birthed the most children: 69, which she had over the course of 27 pregnancies that included sixteen pairs of twins, seven sets of triplets, and four sets of quadruplets. But she's outdone by the male record-holder for most kids, a Moroccan emperor who, according to the Guinness Book of World Records, sired "at least 342 daughters and 525 sons, and by 1721, he was reputed to have 700 male descendants."

　　9.Does size matter?

　　Relax, guys. No matter what those, ahem, movies might suggest, in the United States, the average erect penis is five to seven inches long, and four to six inches in circumference。

　　8.Do you need assistance?

　　Approximately 5 percent of 40-year-old men and between 15 to 25 percent of 65-year-old men experience erectile dysfunction。

　　7.When did you lose your virginity?

　　The average male loses his virginity at age 16.9; females average slightly older, at 17.4. And a new study shows that genetics may be a factor: inherited traits, such as impulsivity, can make a person more or less willing to have sex at an earlier age。

　　6.Do you have a comfortable couch?

　　About one out of 10 married adults -- 12 percent -- say that they typically sleep alone。

　　5.Do you reach orgasm every time?

　　While 75 percent of men always reach orgasm during sex, only 29 percent of women report the same. In addition, most women are unable to climax through vaginal intercourse, instead needing clitoral stimulation。

　　4.Do you get fringe benefits?

　　Two-thirds of college students have been in a "friends with benefits" relationship, citing the lack of commitment required as the main advantage to such an arrangement. More than half of those who had sex with a friend said they had engaged in all forms of sex; 22.7 percent said they had intercourse only, while 8 percent said they did everything but have intercourse。

　　3.How many sex partners have you had?

　　What's your number? According to a survey of adults aged 20 to 59, women have an average of four sex partners during their lifetime; men have an average of seven。

　　2.Did you take maternity leave?

　　Two-thirds of women who had their first baby between 2001 and 2003 worked during their pregnancy, and 80 percent of those women worked within one month or less of giving birth. Compare this to the period between 1961 and 1965, when 44 percent of women worked during their pregnancy (35 percent worked one month or less before delivering)。

　　1.Are you infected?

　　At least 50 percent of sexually active men and women will have a genital HPV infection at some point in their lives. HPV, or human papillomavirus, comes in both low- and high-risk forms; low-risk HPV can cause genital warts, and high-risk can cause cervical and other cancers. In 90 percent of cases, the body's immune system will fight off the disease within two years。

　　第十、为什么会有性爱？

　　是的，这很明显。然而关于男人使其基因传承下去的本能仍然有这样一个论据：一位十八世纪的俄国妇女是世界上生育最多的女人--她怀孕了27次，生下了69 个孩子。其中有16对双保胎，7组三胞胎和4组四胞胎。然而世界上拥有者最多子女的男性却轻易的将她超越--根据吉尼斯纪录，一位摩洛哥的国王至少有 342个女儿和525个儿子，而到1721年，据称他有700个男性后代。

　　第九、“大小”很重要吗？

　　男同胞们，别太紧张。千万别被那些“片子”给误导了。在美国，男性勃起后平均长度为5到7英寸，平均周长为4到6英寸。

　　第八、自己还行吗？

　　接近百分之五的四十岁男性和百分之十五到二十五的六十五岁男性都曾经历过勃起障碍。

　　第七、你的第一次时多大？

　　男性做第一次的平均年龄是16.9岁；女性稍晚，平均年龄是17.4岁。另外最近的研究表明基因也许是一个决定“破处”早晚的因素：在遗传性状中，如是否易冲动，会影响到一个人是否会在较小的年龄时就发生性行为。

　　第六、你是否有个安乐窝呢？

　　大约每十对已婚夫妇中有一对——约百分之十二——表示他们经常单独睡。

　　第五、每次亲热时你都能达到高潮吗？

　　大约有百分之七十五的男性可以在性爱过程中达到高潮，而女性方面的数据只有百分之二十九。另外，大多数女性只有通过阴蒂刺激才能达到高潮，而不是阴道性交。

　　第四、你试过享受“附带福利”吗？

　　三分之二的大学生曾经有过类似一夜情的关系，因为这种关系可以在不需要负责任的情况下得到欢愉。曾与朋友发生性行为的人中，有超过一半的进行过各种方式的性行为；有百分之二十二点七的只有性交，而百分之八的人完成了除了性交以外的其他性行为。

　　第三、你究竟有多少性伴侣？

　　你的数字是多少？在一个对象为二十到五十九岁成年人的调查中，女性在其一生中性伴侣的平均数量为四个，男性为七个。

　　第二、你休过产假了吗？

　　2001年到2003年间，有三分之二的首孕母亲身怀六甲而不离岗位，而她们其中百分之八十的人生完孩子后大约一个月就回到了工作岗位上。相比于1961年到1965年，这两个数据分别是百分之四十四和百分之三十五。

　　第一、你被感染了吗？

　　至少有一半的性生活频繁的男女会在某个时候患上性病。HPV，或称人类乳头状瘤病毒，有两种性状--一种高危害，一种低危害；低危HVP会导致生殖器疱疹，而高危HVP可以导致宫颈癌或其他癌症。在百分之九十的情形下，这种病可在两年内自愈。