Someone has stated that he believes this term was invented by females out of jealousy. He is mistaken. Many women DO NOT find it attractive to learn that a male chooses to sleep with lots of women. Some women find it important to know that a guy has some standards and self-control. Please take this into consideration. If you go around sleeping with with women like it's a game, a lot of females will not take you seriously. That is why terms like "male slut" or "manwhore" exist. A lot of women truly dislike and distrust men that treat sex as some kind of sport or competition.
Amy: That's not really the point, though. I like guys who actually think before jumping into sex with someone. I'm not into guys who think it's all just a game. Maybe some other guys give them credit, but I've never viewed those guys as cool. I don't respect what they do.
Susan: You're such a man slut. I hate you.