My wife hasn't been seen by THAT many, given she hasn't been to a nude beach or anything. (Places like that are like unicorns around here anyway; so many of you are so lucky of your location!)
She has been seen by the three she had relationships with, the three I shared her with (far too long ago!), and a few dozen that she skinny dipped with way back in college.
The only thing recent were her dad and brother seeing bits and pieces of her, but not stark naked.
She hates and despises the idea of being seen nude, but when she talks about it happening in the past, she gets so turned on that I can't keep up with her.