Is it normal to cum and get it on a stranger or non-sexual partner?

There are a few videos out there that shows a dude cumming on stranger at bus stop or whatever. Personally I don't think those are real, but it reminded me when I shot cum on a jerk off buddy.

First time really going to town on my friends bed, he put a towel down between us. We were sitting indian style. He came first, and he leaded over the towel and dribbled down on it. I knew I shot cum far, but played dumb. When I came, I got him in the chest and on his dick and legs. AFter 3rd shot, I angled down into the towel to save face. He was equally shocked at my shots, as he was mad.

The last time this happened was in college. 15 of us crashed in dorm room after hollowween party. Girl I hooked up with gave me hand job. It was dark, and I could just bearly see in teh light from under the door my cum shooting up into the darkness. There were 2 girls on floor next to me, and one on couch above them. that kinky girl knew me, and I think she aimed their way on purpose. None of it got on me, so it went some place. I kinda freaked, and made her switch sides with me so it wasn't so obvious.