I got your butt stuff, right here. Front butt, though.
This is an important work of art hanging in the d'Orsay. It's by Gustave Courbet, and it's titled, "The Origin of the World”.
The story behind it, and its importance in the lineage of art, is beyond scope (I guess I could go all
@Roberteaux, but I'm pretty exhausted playing filmmaker, these days).
Suffice to say, it was an adventure with our Tranny guide, who handled this with impeccable taste and humor. One does have to see the humor in it all, yes?
Since, it's risqué.... I'll put it in a spoiler.