There's indeed plenty of other games than butt fucking, if you don't feel clean enough. And you must renounce to the perfect hygiene down there, there will always be bacteries (hopefully) and other stuffs, so go slowly on the cleaning (as you can destroy your mucus membrane with too many enemas). And to complete the already too long list of advices, I suggest you eat lot of fibers (as it helps to digest and thus to empty your anal canal, with the plus of helping you to loose fat)… Normally, if you're not constipated, your anus will always be empty enough to get fucked (and normally, you should not need to clean it - but your diet (alcohol, fat and too much red meat) or your lifestyle (too much stress) can induce sticky feces) if you don't feel the need to go to the toilet (as that need comes from the rectal distension that induces the need to expulse the feces).

wow.