Had a girlfriend a few years ago who had an unusual bum hole. It was possible to suck her ass hole out if you licked it long enough. Only about an inch or so. You could then get your lips around her bum lips and suck on them. Spread her ass cheeks wide and the bum lips would part a little then tongue fuck her pink anus centre. Would spend half an hour just sucking on her protruding bum lips then my cock could take it no more. Would end up pushing my bell end deep inside her arse hole and giving her a good ass fuck until those bum lips were left gaping wide open and gagging for more.