Wow! Sure sounds like a lot of fun. As of my own experiences, I unfortunately haven't had one as thrilling as yours, but once when I was at my friend's house and we were home alone, she went to shower and I knew she was going to take a lot of time. So naturally I decided to go to her living room and piss on the carpet behind some furniture. At that point my bladder was so full I was almost leaking but I wasn't mad that my friend had occupied the bathroom because I had much more fun pissing on her carpet and stinking it up! It was such a turn on I get horny thinking about it everytime;)