See:

• Largest human penis
• Largest penis in animal kingdom

See:

• Longest human clitoris
• Longest (animal) clitoris

Most women don't mind semen too much, though some unduly fastidious ones complain about its smell or stickiness. Some females, however, have a quite extraordinary reaction to seminal fluid: they are happily rare. In one case reported in 1967 a girl had an acute allergic reaction to human sperm. She came from a family with a long history of various kinds of allergy, including eczema, asthma, and dermatitis. A short time after her first sexual experience she developed a rash and asthma; her lips, eyelids, tongue, and throat became swollen, she had

We have noted that unusual boys may ejaculate as early as eight years of age. As we may expect, there are surprisingly late upper extremes as well.

There are of course sad cases of life-long ejaculatory impotence. But assuming that most men start ejaculating at some time in their lives what is the latest age for such a commencement? According to Kinsey the latest ages of first ejaculation reliably recorded "are 21 for two apparently healthy males, 24 for a religiously inhibited individual, and 22 and 24 for two males with hormonal deficiencies."

Clitoris size has only rarely been of importance in human society.

A few communities -- Ford and Beach mention the Easter Islanders -- have favoured the large clitoris and some natives have tried with varying degrees of success to enlarge this organ in their girls. For the most part however, with a prevailing indifference in the nineteenth-century and early part of the twentieth-century to sexual arousal in women, the clitoris has been neglected. Needless to say, it varies in size.

The most famous "sex-change" case to get to court was that of England's April Ashley. She had been born with male genitals but was psychologically female, i.e. she was a transsexual. She hated her penis and in 1960 underwent an operation to remove the visible signs of maleness: strictly speaking this was not a change of sex, since all she had accomplished was to remove the visible evidence of her genetic sex. In the eyes of the law she was still a man (and in fact had been brought up as George Jamieson). In February 1970 her marriage to Arthur

The onset and termination of menstruation is subject, like all other sexual phenomena, to immense variation. It has been known for a girl to start menstruating at three months old (H. Jolly in "Sexual Precocity", Proc. Royal Soc. Med. 44, 1951), and occasionally the menopause too occurs at a very early age: there are instances of girls reaching the menopause before the age of twenty. The menopause rarely occurs after the age of fifty-five but rare cases do occur. In one instance menstruation was continuing in a woman aged 104.

Pubic hair, short and curly in most of us, sometimes grows to quite extraordinary lengths.

Human sperm were first discovered by a student of Antonij van Leeuwenhoek in 1677 in the city of Delft. The name of the student is not known for certain: he is variously written up as Ludwig Hamm, van Hamm or von Hammen. According to some writers he is a Dutchman, to others a German. One day he brought to the acknowledged master of microscopy, Leeuwenhoek, a bottle containing semen and pointed out that small animals could be seen moving about in the ejaculate.

Valeria Messalina of ancient Rome almost certainly wins this one; indeed her name (the "Messalina complex") has been used as a synonym for nymphomania. With her insatiable sexual appetites she acted as prostitute and seducer.