Responses

Not necessarily, it's a hentai genre tag. Probably to appease to fat/ugly incels having it easier to project themselves into the situation. Because i know no other reason people in gay OR straight hentai would want the dude to look like that when he's clearly not the focus. It feels 99% like a self-insert to appease the generic reader (or that's how it started anyway - it's news to me men want to see a fat guy fvck a hentai chick, but maybe I missed something).
This author got a fetish for fat old men raw dogging pretty twinks or sum?