This one is wild. Did he really get on the back of his girlfriend and grab her hair like he was riding a horse? For a photo? This is the type of thing that gets a father in jail, because you can't just let a young man think that's OK to do to your daughter. Maybe I'm just being a prude, but it's a fair warning to any future dude who tries this with my future daughter.
All that being said, this is very hilarious so I can't really blame him or her for doing it. This is the type of stupid thing you have to do when you're a teenager. It's not like you can get away with a photo like this in your 40s. You have to do it while it's still cute.