I steal this line all the time.
Although preface it with Jordan's "Do you feel confident in the cleanliness of your anus?"
I generally say this to women, to get a rise out of them. My wording goes, "I put this to you. There are microparticles of HUMAN SHIT, lingering within the fibers of your soft, probably sexy female underpants."
Believe it or not ... it doesn't really go so well. But sometimes it does.