It's way funnier to stick a thumb or a finger or four in her butt than it is to pull her hair. I mean, if you're going for the hilarious sex angle, anyway.
Weirder to me is the conversation afterward. I mean, you're not exactly a young dude, are you? It sounds so juvenile to finish up and then quiz one another on what you like and dislike. For probably the last decade, at least, when I'm getting some I'm pretty vocal and direct about what I like("Scream louder") and what I don't like("Get our fUcking pinky out of there"). Similarly, I've found women don't usually have any problem letting me know exactly how they want it("I want you on top of me and fUck me hard") and how they don't("Not in my hair; I just washed it").
You and the ladyfriend sound like a couple of giggley virgins. Or maybe I just bang alot of whores. That was a totally rhetorical statement.