Personally, I think it's when I see character sheets where 50% or more of the description goes into how their penis and anus looks (especially those ones where there are four images: one body, one anus, one flaccid penis and one erect penis). I'm not condemning anyone's freedom of preference, but it just seems that it devalues the worth of a character. A character, just like a person, is a sum of their experiences, and when either gets to the point where their worth is characterized by primarily their sexualization, it just seems to make the character less rounded and exciting.

Anyway, that's all.