Double standards

So I was talking to my bf and his best friend the other night. His friend was telling my bf how he had just gone to a party the other night where one of their friends also went. He preceded to tell my bf that their friend made out with 5 other girls at this party. I of course had to give my two cents and told them how disgusting that was. And said that if it was a girl who had slept/Made out with 5 guys in one night she would be labeled a whore or slut. But nobody judges when a guy does. My bf was trying to tell me it's different. Like hell it is. And this is why I'm a feminist. Equality for all. End of rant