Can you imagine this as an Olympic sport!?!
And no, this is not the competition of who gets to fertilize the egg. Studies in Evolutionary psychology are showing that it is legitimate and natural for men to get aroused by their mate having sex with other men.
…intra-vaginal battles demand men to become aroused to situations that are actually unpleasant for them, for instance the suspicion of their partner’s infidelity. Men, therefore, may become very sexually aroused at the idea of their partner having sex with someone else.”