Why do fat people wear clothes that are too tight?

I’m not kiding at all. It looks funny but to me it it really strange. Don’t you have a mirror to look at before you go out?

I see fat girls with their flabby stomachs hanging out at the mall and girls who are overweight wearing skin-tight shirts and leggings.

Why do fat people wear clothes that are too tight? There are plenty of places that sell clothing for larger people, so why do they wear clothes that are so tight?