Another interesting factoid I read somewhere today: on average only 15% are fit enough to even reach the egg. Yet sperm fitness has been measured to increase af

Another interesting factoid I read somewhere today: on average only 15% are fit enough to even reach the egg. Yet sperm fitness has been measured to increase after exposure to pornography involving men and women, while this effect is apparently not observed after viewing lesbian pornography. The theory is that seeing the competition somehow makes the sperm more competitive. And that's why it's better to hang around with your fellow HN'ers than your nay-saying friends.