If it's not against the law, then why not cheat? What are the consequences anyways? That he or she might leave you, how does that matter, you can always find another person, what will be your loss anyways? Also so what if someone cheats on you, if you ever find out just leave the person, or if you like them just forgive them, or just live with it? I'm not trying to be funny, I really don't understand how it all matters. What is the difference between having multiple partners one after another over any given time span or having multiple partners within any given period of time? How does the time factor even have any serious impact on our idea of which is right and which is wrong? So long as the person is not a virgin, what difference does it make if he or she is being used while you are using him or her or if he or she was used in the past, used is used? For example if I have a new car, I won't let anyone drive it, but if I have a used car, I don't mind lending it to others.