Quote from Ross in The One Where Joey Tells Rachel
Ross: What if they get married? Then he'd be the stepfather of my child. Monica: Honey, I don't think that's something you need to worry about. First of all, he's never going to tell her how he feels about her. And even if he did, you have no idea how she'd react. Ross: Sure, because women never like Joey. You know, I think he's a virgin.