Oh, that is very strange. I haven't heard of that issue in particular. I've heard of something similar...don't know if this will help or not.
I heard of one case where a cat would pee in the woman's suit case, if she left the suitcase out and open. The woman figured out the reason was that the cat hated it when she left on business trips, leaving the cat behind. The cat associated the suitcase and her packing her clothes, with her leaving. So to show his dissatisfaction with her leaving, he would pee in her suitcase. This included if she had it open on her bed with clothes in it, in the middle of packing for a trip! So she learned to keep the suitcase hidden in the closet and never leave it out when the cat had access to the room.
I had one cat that did something kind of similar. He always used the litterbox, faithfully, EXCEPT when me and my boyfriend (at the time) went out of town for a couple of days. Without fail, when we were gone, he would pee in the bathtub. Of all things to pee in or on, I guess we could count ourselves lucky that at least this was easy to clean up. This cat leaned a little toward the nervous side, so I believe that he was uneasy and nervous without us being home, maybe even scared, and this was his way of showing his discomfort.
I also knew a couple that had recently been married. The husband had a cat named Wednesday prior to the marriage. After getting married and the wife moving in, Wednesday started peeing on the wife's pillow; never on HIS pillow. Only on the wife's pillow. The wife always thought it was because Wednesday knew that she (the wife) didn't like her (the cat). So this cat was showing distaste for the wife by peeing on the wife's pillow.
Some cats will pee anywhere other than the litterbox if they don't like the litter or if their litterbox isn't as clean as they require it.
I can guarantee you that your cat is trying to tell you something. The trick is to figure out what.
So as a suggestion, maybe try to figure out if something happens prior to the episodes where the cat pees on you. Are you gone for some length of time? Have you recently disciplined your cat? Is the cat box dirty? Have you just had a guest over that the cat doesn't care for?
Good luck! I hope you figure it out.