Why?

So I bet everyone of you have taken an informal group photo, with your friends, with your family, your classmates. Whatever. And when you look through the photos, did you realise that some of the people tend to crouch/lower their body?

I have no idea why people do that. Maybe I've done that, but yea. I mean it's not that everyone has to look like they're of the same height or something. It's a weird thing isn't it? You do crouch a little when there's people behind you and wants to show their face. But if there were only one row of people?

Look through your group photos. I bet you can find one like that. :)