You Know How I Know You're Gay?

Apparently this was made after "The 40-year-old Virgin" was completed, as it isn't in the film or apparently on the DVD bonus content...

Once I read a post on some board which was speculating on whether actor Paul Rudd was gay. It was by a gay plumber who said he had worked on Ruud's bathroom. Said tradesman claimed that you can always tell if a guy is gay by the looks of his bathroom. Plumber's verdict: Ruud isn't.