There was a minor character, a...er... servant girl in Lamb: The Gospel According to Biff, Christ's Childhood Pal, whose name was "Feminine Keeper of the Three Tunnels of Excessive Friendliness". Did Christopher Moore go and write an autobiography for her?
I don't think she was referred to as a "hole", and I just realized that Eroticon 6 was a city on Mars..... Eccentrica Gallumbits, if memory serves. ETA: Memory does serve indeed, at least when trying to dredge up a bawdy joke that I last read over twenty years ago. House keys, taking out the trash, whether I've zipped up my fly? Memory is on holiday with some chick from Total Recall....