That playing-with-cum stuff reminds me of a scene from the movie Caligula, starring Malcolm McDowell as the mad emperor. He's visiting some female friend who enjoys watching dudes jack off into a bowl, and jokingly sticks his finger in the bowl and rubs it in his hair, jokingly commenting that he heard it's good for fighting baldness.
I got one for y'all. I never done this (don't want to, either), but when I lived in the nether regions of Alabama years ago, I remember hearing of at least two people doing this...
After a night of heavy drinking, one of those guys would start feeling hungry and have a bowl of cereal (cold cereal in milk). He would then puke it up, and because his judgement was so impaired by the drunkenness, he'd then eat the vomit that landed in the bowl. Any of y'all ever recycle your own barf like that?
I don't gross out easy, but I could probably ralph just thinking about that.