This section is from the book "Human Sexuality", by J. Richardson Parke. Also available from Amazon: Human Sexuality.
Horses, when leading a lazy, indolent life, sunning themselves in the pastures, may be seen flapping their erect penises, until emission takes place; and Ellis records it as a fact that Welsh ponies habitually produce erection and ejaculation in their stalls, bringing their hindquarters forward and closing their eyes dreamily during the process,'
It has been observed that bulls, goats, and rams produce ejaculation by using the forelegs as a stimulus; and stags, in the rutting season, rub themselves against trees for a similar purpose. Sheep masturbate; camels relieve themselves by going through the movements of copulation with inanimate objects, and elephants rub and compress their penises between the hind legs, to bring about ejaculation.1 F£re" remarks that mammary masturbation is found in certain female animals; and male monkeyB, forever fiddling with their forever erect penises, are so addicted to the habit as to render quite natural the nearsighted old lady's wonder, when she saw in the Zoo a monkey, holding a cake in one hand and his little red penis in the other, why he didn't "eat his radish with his cracker."
 
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sexuality, reporduction, genitals, love, female, humans, passion