>>118484375because sexism. women are supposed to be objects. they are either beautiful, elegant, and chaste, or they are dirty, smelly, and bitchy. unique personality is forbidden. At least, back in the 50's, when all this shit was codified.
these days, female characters are much more distinct, but they are still too precious to have any kind of real flaws, much less lust.
animated sitcoms like Family Guy, notwithstanding