The whole game is tongue in cheek, every time he suggests he's ass fucking someone for their psychological well being, we know it's a deliberate joke. The delivery of these lines is always comical. Another lamentation of the mc this episode:
"Sometimes I wish I was just a regular guy and that I didn't have dozens of young women I needed to sexually pleasure."
and this insane suggestion:
"She needs to understand that my penis is not her toy to play with, it's an important tool for maintaining discipline around the school."
It's obviously meant to be funny. If you take it seriously, then yeah, it comes across ridiculous, but it's a BDSM comedy. I love it.