Imagine that every single man and every single woman in the world is in a completely happy monogamous relationship. Their partner then tells them that it’s okay for them to have sex with other people if they want. Let’s imagine that both people know that the person saying that is being completely honest about it being okay, too.

What percentage of men choose to have sex with another woman, knowing that their partners will not be emotionally hurt by it?

What percentage of women will have sex with another man, knowing that their partners will not be emotionally hurt by it?

Do you think that the percentage is the same, or substantially different?

Please provide your reasoning.

This question assumes heterosexuality, but people can talk about bisexuality and homosexuality if they wish, too.