I don't qualify to vote, but my only experience was getting it up the bum after my Lover had come. A most curious sensation, but not one I'm particularly keen to repeat. Did stimulate the bowels to spit it all out - a bit of a waste of cum, but as I'm a bit more cautious about these things I would not undertake a cavalier barebacking now anyway.
As to pissing onto and being pissed on, my general feeling is one of distaste - it is all too often a disguised gesture of contempt, a bit demeaning. I think the thrill is probably mainly in the fantasy, but I could be wrong. Anyway I'm not keen on the taste of urine.
So, over all,
However let those who enjoy it have a good splash ! !