Heard a young (sounded like an 18 year old girl) scientist on UK radio this morning. She was saying it has been discovered that when you put 2 or more men's cum together, the sperm fight and some go kamikaze to make theirs win. According to her, this has "amazing implications for women's sexuality" and it proves women are biologically "supposed to be mating with multiple partners at once".

I really don't agree. Just because sperm had to develop this skill in a "gang rape" point of human history, doesn't mean it is natural. By that logic, our body developed resistance to poison, we "should be" drinking poison all the time. Just because pressures forced a skill to evolve does not mean that pressure is the way to live.