when you zip and fasten your trousers

Only if the jeans are too small or too low-cut. It helps if your clothes actually fit.

I love how the pregnant chick is the first one to respond. Haha.

my trousers fit okay otherwise. i'm just girthy i guess?

Dudes just need to buy bigger trousers. Ill-fitting clothes on men or women = the same thing: gross.

Yeah, but if a guy runs to the barrel-chested side are any pants really going to fit in the legs, ass, AND the waist? If you're chesty and torso-y it seems hard to keep things from spilling over a bit without being baggy everywhere else. And in my humble experience, barrel-chested guys often have great posteriors -- it's all in the meatiness.