I cockblocked my friend but I swear it was an accident.
Was it really an accident?
He is a wimp and I was worried about his performance with girls
I get that you are worried for him, but this is his relationship and chance. He will never learn how to get better if you're always there preventing him. Let him have some breathing room.
Not only is he a wimp, but I can't let him go out with a slut just because it's his first time.
You should mind your own business when it comes to your friend's personal life. Cockblocking him and insulting the women he is interested in sounds like you are the one with the issues, not him. Don't you think everyone would be happier if they tended to their own relationships?