By birth or by choice?

[ZTAngel]

Originally posted by justamom
cloud9 wrote-There are species of monkeys in which the females have evolved over time to have sex with eachother as well as with males. This allows them to form better social relationships with eachother and dominate the males.

I had no idea about this! This would seem to indicate that monkeys, like humans, engage in sex for pleasure. I always felt for animals it was just nature's means of keeping the species alive. Hamsters on top of it. Now I have all kinds of things I'm wondering about........ Guess the line between animals and humans gets thinner every day

I never paid much attention in my 10th grade biology class but one day our teacher started talking about procreation and I was all ears. She was saying that humans and one other animal species (I think it was pigs) are the only mammals that have sex for pleasure. I dunno if this is true or not. Any bio majors?