Hazbin Hotel and Helluva Boss aren't funny and are mostly immature "ha ha, people have sex and say cuss words and do bad things!!! funny!!!" type cringe humor.
Both series mostly serve as Rule34 material, and that's clear from character designs.
So this is... not surprising.
Also, it kills me to have this opinion on these shows because the character design is good (despite being cheesecakey), and the animation is often top notch. Too bad I can't stand the fucking writing.
Huh. I never really thought of the character designs from helluva boss (haven't paid attention to the hotel) as being designed to be rule 34 stuff. Everything I've seen has the characters differing pretty wildly from their standard look in order to get the sexual characteristics.
I don't deny that, at all. It's just that everything I've seen of her basically throws the actual design out the window, and keeps only the coloring and canine bits. Maybe the hair and the goth clothing if the artist pays attention to details.
I believe that anytime somebody says "don't have sex" in some form, that says that the speaker is emotionally insufficiently capable of having a baby right now, so it says more about the speaker than about those having sex.