If all girl monkeys were the same, do you think dude monkeys would want to mate with anyone? No. There are girl monkeys with nice butts, and girl monkeys with like..lice. or something. The dude monkeys mate with the better specimen to create more better specimens, to continue like, the cycle of life or whatever. The ones with lice are like, ninjas cause they don't spend their time mating, they spend it scavenging for food and learning how to be super awesome. The lice eventually fall off from them due to over exposure of awesomeness, and then the licey girl monkeys evolve into all us forever alone chicks. But I forgot to mention that one really awesome baboon that ends up falling in cute monkey love with licey monkeys. But no, not one girl is created equal. Study evolution before you preach this stuff.

There's an answer to everything #1