The subject of reverse oral reminds me of a story told to me many years ago in a pub (where else!). Apparently this guy was on his way home after having a few beers and felt horny. Not having much money left, he ended up in a filthy hovel with a rough tart. He couldn't bear the sight of her ugly face, so asked to go straight into 69. Immediately, he noticed a fishy aroma but, bolstered by dutch courage, he pressed on and slipped the tip of his tongue into her pussy. The taste, also, was distinctly fishy and when he probed deeper he could feel something inside her. Intrigued, he withdrew his tongue and slipped his thumb and forefinger in, grasping the object, which he then pulled out, only to find it actually was a fish. He eyeballed it for a few moments before he felt compelled to enquire "What's a nice plaice like you doing in a girl like this??"