No, not mocking, but being brutally honest...
To be honest, my best mate is the groups pervert... I spend about, 2/3rds of my time comparing him to a stalker, warning girls to get away from him and we all laugh. It's not mocking, and iwouldn't do it to anyone else I don't know but we're having a laugh. If anyone he didn't know joked about him being a bit of a ladies man he'd punch their lights out...

Actually, don;t take it as a joke, take it as a sign of friendship. If they can laugh at you they trust you enough to take it the right way...
Either that or their being rude and deserve having their lights punched out.

It's not mocking, it's pushing.