Well at least part of it has to be that fat people cant get attractive clothes becausr they look like shit in anything. Gay men tend to be relatively well dressed at least in comparison to straight men, and will be a lot more focused on style. When your body shape is "amorphous blob of shit", youre not really going to have much style in terms of clothes, which is why neckbeards always have a fucking fedora, because its difficult to get a fat cranium.