There are a lot of weird people with a lot of weird fetishes.
I remember I was at a work holiday party with an ex girlfriend like 3 or 4 years ago. Coworkers would bring their wives, girlfriends, or various significant others.
We see this one guy Jim, a good looking dude. Blonde, 6 feet tall, in good shape....a bit of a dork, but whatever. And he introduces us to his wife, who wasn't "ugly", but she was literally 3x Jim's size. Huge. And this was BEFORE he got her pregnant.
So, we shake hands with them, and they walk off, and I continue talking to my girl about whatever the f**k I was talking about. She stops me mid-sentence ans says, "So...we're just going to ignore that, right? We're not going to acknowledge that he could literally live inside of her?"
Point is - it defies everything I believe about attraction, but some dudes legitimately have this sick fetish for fat chicks. It's creepy. But I've seen it.