Be yourself. "What you don't like sex? You've obviously been having it with the wrong guy, then".
Be cocky like you're doing but don't be afraid to poke fun at yourself. Remember the classic acronym "Cocky and Funny". My favorite when I got overboard with the "cocky" is something like: "Shit! Laugh - I'm laughing my ass off right now cuz I'm one stubborn SOB and just crack myself up. Perhaps I'm just that easily amused. But at least I dont yell at little kids for walking across my lawn. Haha!"
When saying "cocky and funny" the best example of doing it right is Dean Winchester on Supernatural. "Okay - Im gonna kick your ass first. Then I'm gonna kick his ass next, then that big dude's ass" As he's getting the shit kicked out of him.
" Hey, I like vagina! Men don't know how to dress, cannot carry on a conversation without wanting to get into my pants, and are just FUGLY. If I were a woman I'd be so gay.