Curious Cat Question

I don't know if this is limited to the local setting or not but...

... why do some guys-- after eating a meal-- walk around with their shirts up and proudly showing their oversized tummies like a merit badge? I had a smoke outside my office early this afternoon and on my way in was this guy with the contented look of the just-fed standing at the door.

Unfortunately, he had rolled his shirt up and his growing paunch (lined with hair pa) was almost blocking the entrance. I mean, what the fuck? Do I really need to see a hairy stomach that would do a bear proud displayed like that?

Aaaghh...