Some years ago, my ex and I were at the Phoenix airport waiting for our flight. I went to the bathroom to jack off.
I was in a stall facing the toilet, whacking my wang and I heard a noise. I looked over my shoulder and there was guy standing on the toilet in the next stall. he a watching me, and cheering me on.
At first I was embarrassed, and tried to shoo him away. He wasn't leaving, and since he seemed to enjoy it, I got really hard.
I gave hime a show, and shot a huge load. By the time I got out of the stall, he was gone (still makes me hard to think about it)