As glad that I am that they are finally moving along with his fears around celibacy, I think his dad just going "OH YEAH THAT DOESN'T EXSIST LMAO" is a cheap way to go about it.. They could've cut that dude being a pervert out and replace it with a few chapters surrounding his dad realizing Kuroiwas feelings for the girls. THEN he could go and talk to him being like, "Hey, I notice how you defo have feelings for these women (Cough it would be mona that would make him notice.) You don't have to follow our" Okay you get the idea this is getting long.
I said it before and ill say it again, theyrr using shitty cheap strategies to move the plot along