Its just a mental image that I think is funny.
They use to have Generic foods at some stores - they had labels that looked like they were printed with a can of spray paint and a stencil. A can of soda might have this big SODA printed on it. I just picture this guy with MALE printed on his t shirt, along with the whole idea of things stereoptypically associated with men regarding sports, cars, beer and women. I find this funny when thinking of myself because I am not stereoptyically male, except maybe for an interest in some sports.