Umm, obese men lose their "members" in rolls of fat. To pee, obese men literally have to pull those things out and hold onto them. If they don't, or can't, stretch them far enough, they'll pee all over themselves.

Dicks are mounted on torsos, not bellies. If a man gets too fat, the fat rolls down over his dick and eventually. consumes his dick. A man trying to use that dick for sex, has to hold his fat belly up with both hands just to get a peek at his member. IOW, obesity reduces the "available" dick size.

Rolls of fat are also the breeding grounds for royal yeast and bacterial infections that stink, burn and itch - and painful boils that cause irritability and nasty tempers. These infections and boils can get so painful, people avoid washing themselves.

Sorry to be so graphic, but obesity is a difficult, and often painful affliction.