Oh, yeah, I'm not railing against the fact all women on tv are generally pretty(*), but there's pretty and then there's being explicitly sexualised into a particular cliche. I mean as with any cliche there are some evil women who, while still tv-pretty, aren't bad-girl sexualized: Lilah from Angel (mostly), Evil!Wendy from the Middleman, um...Anyway, that's not the same as putting on a leather corset and seducing the hero, you know?

(*)Though I think there could be more unpretty ones, there's plenty of unpretty men, even if the average is still pretty far above normal