There will be no need of a stunt bum, I can assure you. I suppose it depends on tastes, but I'm probably one of the few women I know who likes my own bum, so I'd be very sad to see it replaced with a stunt bum (although, did you have any particular models in mind?)
My hub says my bum's a stunner. Which is probably more than you wanted to know

In fact, he once told me that the first thing that attracted him to me was my bottom (as opposed to say, my stunning personality or winning smile I suppose. Hey ho, you gotta start somewhere I guess. Men are the oddest creatures, I don't know how they avoid constantly walking into doors

)