I remember reading a fic once where Wilson is looking at one of his own photo albums and asks House if he wants to look, and House says no because it's boring. As Wilson heads out the door he casually mentions that in the album is a photo of himself in drag. Naturally House can't resist looking. I think the photo was from Wilson attending a costume party or appearing in a friend's film. I don't think the story was overt slash but House was definitely turned on, and Wilson came home to find House had bought a bunch of women's clothes for Wilson and insisted Wilson dress up in them. I'm afraid I don't remember who wrote it or what it was called.