Ugly bastard is predominantly in Japanese NTR games who serve as corruptor. Western straight male players are obsessed with Beauty and the Beast syndrome which is a young girl and old hobos. Thankfully, the majority of gay Devs have actual taste and they gave us games with handsome hunks and pretty boys.
It's a Kink, so if you don't hv it, you won't get why. Just like Teratophilia / Furry.
(Maybe I shouldn't use the existing term "Ugly Bastard" but there's no better term)
Like here are people saying the Monsters / Aliens (Bradley, who's madly popular here) are Ugly in this game,
to me they are super sexually attractive. Sure they are "Weird", but the designs are really good and hot.
Being "Totally Fictional" means I can completely detach them from reality, not comparing them to real life beings.
Same logic apply to Ugly Human: To me they are just Uncanny and Unpleasant to look at, but I bet there are more Patroens find them hot.......
.........That must be why they are so popular that dev only makes CGs for these ugly Human, while stopped making Monsters / Aliens, right? Rrrright?
(Joking, the Scene writings are good and unique in the "Weird and Dirty" way

)