“2 Sexâ€”what is it good for? Scientists are not sure, since asexual reproduction is a better evolutionary strategy in some important ways.
“6 Barbary macaques have a distinctive way to get their mates to make a sperm donation: yelling. If the female does not shout, the male almost never climaxes.
“7 How do we know this? German primatologist Dana Pfefferle watched a group of macaques, counting the femalesâ€™ yells and the malesâ€™ pelvic thrusts. She says this work is ‘quite weird, but itâ€™s science.’
“11 The tiny male paper nautilus, an octopus, impregnates the much larger female by shooting his penis (a modified tentacle) into herâ€”and leaving it there.
“12 Homosexual behavior is found in at least 1,500 species of mammal, fish, reptile, bird, and even invertebrate.”
20 Things You Didn’t Know About Sex, Discover, March 19, 2008
Ah, nature, sorry, Nature.