I sometimes notice a whitish-beigey-grey cheesy substance on my anus. It's slightly moist and there's usually not a lot, certainly never enough to move past the anal area onto underwear or other clothing. It has a faint cheesy odor and no fecal smell. When looking around the web, the closest matching thing I could find was descriptions of smegma, but everything I read said that that was a genital secretion. I'm really kind of worried that I should be paying more attention to this, if only for the sake of sanitation. If it's a discharge or something really nasty I want to do something about it right away. Does anyone know what this is? Any help is hugely appreciated.