For best results before you roll, you may wish to choose a body of still, dank, polluted sludge water. For extra bonus points and a multi layered scent that will last for days if not the entire week, choose water that has something dead in it. Results will be measurably better if you avoid freshly dead, instead choosing rotting, maggot dead.
WARNING: As per FDA regulations the common side effects with this approach include eyes rolling back in head while making odd, guttural moans of pleasure. This may or may not be accompanied by a torrent of obscenity directed at the subject by the owner.