I think you're all are going about this the wrong way. A super mutant wants to pick up girls with me, then the wingmanning process would be a lot different. I'd probably have him go into a bar and start causing some trouble, then I would come in, be like "I think it's time for you to leave!" He would get all pissy and start a fight, then I would kick his ass (or rather he would pretend to get his ass kicked) and that's a great spring boarding point for a conversation.