>>3018178
You might be talking about the manga artists.
The other toilet artists gathers requests and most requests are squat toilet.

And squat toilet allows people to get a clearer look of the piss and poop. Though I somewhat found western toilet can also be sexy. It would be a problem if the girl is wearing a skirt however. Squat toilet can still show the girl's ass while western toilet would have their skirt covered their asses.