"Put your wings down"

Why is it, I wonder, that even in the narrowest of spaces, in queues in shops, in the aisles of markets and many other places, men will stand with their arms akimbo? They block gangways, take up the space of two people, they`re in the way of people trying to pass, and they seem oblivious to this. How I long to say to them “put your wings down”. Why can`t they stand with their arms at their sides?

I expect some body language expert would tell me there`s a reason for it, but I fail to see what it could be.