is because of inconsistent character construction, you see, half the time they construct the characters of using the method of geometrical shapes and have the outfits as part of the skeleton of the character, as opposed to draw them in "naked mode" and having the clothes being that, a layer of ornaments, you believe Marge has her actual body construct the same way as you picture related when she is in her casual clothes? or when she is meant to look not glamorous? this is an issue in American character design.
And let's be honest, even their attempts at actual anatomy is far from great because of that idiotic need of giving Jessica rabbit-esque non existing waists to the females.>>98702520>>98696141>>98695969>>98691446
maybe these don't look too bad but usually is still too cartoony.
Also the fact that Simpson characters don't have actual lower jaws but animal snouts, and actual boogie eyes and the position of the eye leds, yeah no wonder good simpsons cheesecake/lewd fanart is rare outside of Apostle.