Approximately one in a hundred males are capable of self-penetration (inserting his own penis into his own rectum).

In 16th century England, men wore a braquette  (codpiece), which was like a padded jockstrap.  This caused a conspicuous bulge in the trousers and was intended as a visual aphrodisiac.

Kinsey sex researchers found that 3 out of 4 men reached orgasm within 2 minutes of starting intercourse.

Birds start off with two embryological ovaries but in general only one - the left develops to maturity and the right one remains rudimentary. If however the left ovary is destroyed by disease then the right ovary will develop, not into a mature ovary, but into a functional testis! In this way a complete sex change can occur in some species of domestic fowl.

The first two sperm banks were set up in Iowa City and Tokyo in 1964.

The term “camel toe” refers to when a woman’s vaginal outer labia can be clearly seen through a pair of tight pants – usually caused when the crotch seam rides up…ouch! It is also known as the “front wedgie”.

The moral majority would have us believe that anal intercourse is the monopoly of gay men.  According to the Kinsey Institute, 30-40% of females have engaged in anal intercourse.  This, by the way, was the most frequently missed question (80%) on the Kinsey sex test.

The heart beats up to 140 beats per minute at orgasm.

The biggest sex book collections in the world contain all types of sexual literature – from the simply titillating to the driest scholarly tome. The Kinsey Institute has around 20,000 books of all sorts as does the British Museum. According to H. Montgomery Hyde, the Vatican Library tops them all with around 25,000 volumes.

Almost all men have some sort of curvature in their penis.

The largest penis in the animal kingdom belongs to the rorqual whale. Their penis can be10 ft. long with a diameter of up to 1 ft.

The average adult penis in the flaccid state is 9.5cm (4”).

Urolagnia is the word used to describe people who like to drink their own piss. The drinking of urine can have a proudly erotic significance for some people.

Growth hormone plays a crucial role in penis size. Dwarves who lack sufficient levels of growth hormone (but who have normal levels of testosterone) often have penises that are in proportion with their height.

Kinsey and his colleagues investigated graffiti in public toilets. They found 86 per cent of the inscriptions on the walls of the male toilets were found to be sexual (genitals, oral and anal sexual behaviour, "obscene" words, etc.); but only 25 per cent of the toilet wall inscriptions made by women dealt with sexual topics. Most of the female inscriptions featured hearts and referred to love or names e.g. “John and Mary," "Helen and Don”.

Approximately 1 in 100,000 males is born with a diphallus – or double penis!

The largest vagina in the animal kingdom is unquestionably that of the whale. Averaging 6 to 8 ft. in length, they are capable of further elongation if necessary upon penile insertion.

Human sperm was first discovered by Ludwig Hamm, a student of the master of microscopy, Antonij van Leeuwenhoek in 1677 in the city of Delft. Hamm brought Leeuwenhoek a bottle containing semen and pointed out that small animals could be seen moving about in the ejaculate.

Two or three males in a thousand are able to suck their own penises to achieve orgasm and ejaculation.

Chinese eunuchs, seeking regeneration of their lost sexual organs, would eat the warm brains of newly decapitated criminals.

In ancient Irish legend amorous girls were said to invade graveyards in the search of corpses buried nine days. When they found one they cut a narrow strip of skin extending from the top of the head down to the extremity of one foot. They then tried to knot the length of dead skin round the arm or leg of a sleeping lover and to remove it before he awoke. If the girl kept the skin hidden from all eyes, and managed to perform her task every night for nine nights - so long would the man love her!

Many species of plant reproduce bisexually. Algae first began to reproduce bisexually around 1,000,000,000 years ago.

The first magazine to expose women’s pubic hair was "Penthouse" (April 1970).

In a Kinsey survey of more than 5000 men, three or four were found who could ejaculate by deliberately concentrating on sexual fantasies, without any genital manipulation.

Louis XV of France, a man of prodigious sexual appetite, established a royal harem in the Parc aux Cerfs, situated in the grounds of Versailles. The cost of maintaining this institution was high. Some of the major items apart from board and lodging on a luxurious scale were indemnities paid to families, dowries for those who were married off, the maintenance of illegitimate children, presents to the élèves, and the particular expense of Mere Bompart. It has been estimated that in the thirty-four years of its existence the Parc aux Cerfs cost nearly 20 million dollars, or around $600,000 a year - a lot to pay for the sexual pleasures of one man.

Eastern and Western culture is rife with the sexualisation of the foot. Records show that as far back as 1600BC Egyptian queen Hatshepsut employed a team of palace eunuchs to tickle her feet with peacock feathers.

A popular request in the Parisian brothels in the 1920’s was to have a hot omelette – straight out of the skillet – laid upon the bare skin.

There are many historical instances of men and women in love with corpses. The tyrant Periandrus lived a year with the dead Melissa. Herod was said to have slept for seven years next to his dead wife Marianne. And as Charlemagne grew older he would not be parted from the remains of his German mistress. Queen Juana of Castile kept the corpse of her husband Philip the Handsome near her from 1506 to 1509.

Certain Native American tribes are known to stage competitions for the largest and ugliest penises.