I've checked all of the body types, for all of the races (but not ever race-gender-body type, just random combinations). No matter what you choose, the PC is described as having 'boyish' or 'tiny' hips. I'm 70% sure that is dependent on thickness, and since 'Overweight', 'Bear', 'Plush', 'Amazon', and maybe 'Bodybuilder' shouldn't realistically have such small hips. Or smaller butts, but the butt descriptions don't even really describe much, usually.