Whatever the computer guesstimates as your nude body will always be an estimate. It cannot know what you actually look like under your clothes.
Being able to differentiate real and fake isn't the point. An occasional nude is special. An occasional fake nude is special. An infinite number of fakes nudes might just stop having any real power to abuse.
Sexuality is mostly in the mind and a real nude image has a element of fantasy that a fake doesn't have. The fact that it's just a made up bunch of pixels that has no real meaning in real life is a factor that we haven't yet fully experienced.