Humans
Ducks fight the battle of the sexes in their genitals
Male Muscovy ducks have evolved super-long penises 鈥� with "explosive erection" ability 鈥� while females retaliate with antagonistic vaginas
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Humans
Sex and shopping 鈥� it’s a guy thing
Features
Humans
How male bedbugs avoid getting shafted
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Humans
Women on testosterone only think they’re macho
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Humans
Homosexual selection: The power of same-sex liaisons
Features
Humans
Guapa, it’s your genetic ancestry I love
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Humans
Better-looking sportsmen more likely to win
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91色情片
Limp reception for female ‘libido drug’
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91色情片
Breathing new life into ‘old’ eggs
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Humans
Good vibrations get a club-winged manakin going
When it comes to wooing a mate, one bird finds it pays to make like a grasshopper
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Humans
Crabs trade sex for protection
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Humans
Fellatio keeps male fruit bats keen
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Environment
Dangling stockings reveal whales’ sex drive
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91色情片
Cervical cancer vaccine reminds girls of sexual risks
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