what the dude above said about pregnant women being extremely horny, i have an experience from just two weeks ago that i think bolsters that argument. the memory still disturbs me now...
i was on the tube in london going to work and sat down. opposite me, and one to the left were sitting a couple, a pregnant woman (5 months?) and what i presumed to be her husband sitting next to her. Laying across them was their daughter, who looked maybe 3/4 years old.
Glancing around as you do, i couldn't help notice that the pregnant woman was staring, STARING, open-mouthed, directly into the groin of the man sitting opposite (who was sitting next to me). this freaked me out somewhat, that she could be so blatant right next to her husband.
anyway, the guy next to me clearly got very embarrassed as she couldn't seem to stop staring at his crotch, so he put both his hands directly over it and just held his head down.
then something happened which i wish i could erase from my memory because it was so disturbing... the pregnant woman lifted the trouser on one of her daughter's legs and started stroking it up and down, all while holding her stare at the man's groin. the motion was unmistakable, slow, pause at the top, back down, repeat. then she started speeding up to the point where it just looked freaky. other people were looking now, as this woman was quite blatantly masturbating her daughter's leg while staring at some random guy's groin, on public transport. this was taking place over several stops, more than 5 minutes...
the daughter finally kicked her leg out and made a noise, clearly not particularly comfortable with her mum's 'stroking'. at this point she stopped staring and seemed to get out of her **104**.
IT WAS SO WEIRD!!!!