Boys vs girls: the great top removal debate

Cast your mind back to when you were a teenage girl (obviously if you're a bloke reading this it might not apply unless you've had some dramatic surgery since then.) Anyway, you'd be standing next to the rugby/football/cricket/field/pitch thing. You'd be looking glam, watching the teen boys strutting their stuff and looking manly. And whenever you saw one of them change tops or take a sweatshirt off - getting a glimpse of honed tummy - you noticed something.

Boys pulls their tops off over their heads. They reach behind their heads, grab and yank. This causes maximum belly revealing. It also means that they tend to get their heads stuck particularly if it's a tight fitting top resulting in maximum messed up hair effect. At the time, you think they do this because it looks cool....

Fast forward to now. Two small boys aged 3 and 5. They haven't got a clue what cool is. They don't know how to impress and couldn't give a flying fig about doing it even if they did. Yet they too pull their tops off in the exact same bizarre manner.

Girls don't do this. Girls cross their arms over the front of their bodies, clutch the bottom edge of their shirts/tops and pull them off upwards so that they go over their face first before finally going off the back of their heads. This is a slightly more elegant way of doing things although it can also result in maximum belly revealing unless you have a friend near by to hang onto your underneath layer so that it doesn't creep up too revealing your boobs in all their glory.

Why is it that men and women do this simple task so very differently? I mean really? This isn't a rhetorical question. I want to know. It's as though we're hot wired that way. My children watch me getting undressed far more regularly than they do my husband so it follows that they'd copy what I'd do. But they don't. They continue with the very masculine backward shirt pull.

Is the boy way of doing it more effective? Less time consuming? Is it so that their line of sight is unobscured for longer so that they can see potential baddies coming for them? Are girls more protective of their bodies and so wrap their arms around themselves this way?

I know this isn't up there with solving global warming or coming up with a cure for cancer. But it is vexing me all the same. Enlighten me please.