Pan87 has little real world experience. He has never been in a small isolated group of very young horny adults. If he had he would know that there is a lot of " cross pollination" going on lol. Again I used examples such as frat houses, military girls, small towns etc. I even sent a damn video of a tribe being sexually liberal with a stranger and the alpha of the tribe didn't care. Guys just are too afraid to consider that women are more promiscuous than we think.I think when you say "breed" it sounds dubious. Which is why I get where @Pan87 is coming from. A pregnancy takes 9 months alone, not to mention birthing and nursing the little bastards. This is the price (and reward) of sex for females. Unless you mean she's out bottoms up for the whole tribe and whoever's sperm gets their first is the lucky winner. I would think that during ovulation she would seek out the best mate, not roll the dice on the whole tribe. Also what about inbreeding?