Before too much is read into this, it's a valid point set by inability to do what is already possible for other portions of the body upon character development.
Ok so I think it's a little sexist to allow players to alter boob/chest sizes but there's no crotch adjustment bar. Why can't my character walk around with an equivalent to real life portions? So yes I know this sounds silly but seriously. If I can give my character huge breasts I want at least a realistic bulge.