Yeah, Savant and Sorcerer is almost the gold standard for 'are you drawing an RPG cover, or are you drawing your fetish art?'.
I'm no prude and I love my cheesecake, but I remember wondering why exactly they'd use THAT image. Y'know, aside from 'sex sells'.
DID it sell?
I've talked to artists known for doing sexy stuff (the late Mark E. Rogers, Adam Warren), and the impression I've gotten is that sex sells, but not as well as you'd think.
Sex also tends to drive out other qualities that might also sell.
I think you're better off keeping it PG-13 and implying more than you show.
In that female halfling bard picture up-thread, what I object to is that she's wearing a backpack on stage.