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A Brief History of Sex
How Fifty Animals DO
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Alligators animals antlers babies bacterium Barnacles behaviour belly breeding season BRIEF HISTORY carnality Chimpanzees chromosomes climb ashore cloning consummate the relationship copulation takes place courting pair courtship cuckoo dance Dragonflies Ducks Earthworms eat his head eggs ejaculate female and male female passes female's vagina fertilised fight foreplay genital orifice grabs harem heavy petting highly promiscuous HISTORY OF SEX hooks Horny hums inside Kangaroo latches legs lifting his tail male climbs male courts male in heat male mounts male release marriage masturbate mating duels Mating takes place Minks monogamous mounts the female neck neighbours nudges numbers ovulating penis penises Porcupines Praying Mantises Producing heirs Rabbits ready to mate remain reproduce round and eat Salamanders Sea Slugs Seahorses semen sensitive tips sex evolved sex organs sexes are highly sexual shovel signal slime Slugs are hermaphroditic Snails snake species sperm sac spewing squirting stag Starfish sticky syringe Turtles whale wonder