There's something very deeply humorous about the intersection of hyper-femininity and "inconveniently large anatomy" that produces a lot of big lip-based kink stuff. Like plump lips in rich colors are just entrenched in the social construct that is being female but then it meets the sort of impulses that give us OCs with car-sized tits to be possibly an even worse kind of inconvenient.
Like you go from "conventionally attractive lips" on more normal characters to "dick sucking lips" on bimbo characters to "Such an egregious monument to femininity that they can no longer function normally as anything more than eye candy, speech is beyond them and the consumption of food and water has likely been severely complicated as well." on hypers.
I fucking love this kink, never change you freaks.