I had to read the question over again and think about nasty. One person comes to mind and my stomach feels a little funny just thinking about him.
This gentlemen jerked off while I vomited on his cock.
He sees me a few times a year and I never know what will be next. He always tells me the morning of so I can get ready. I wasn't sure if I could pull this one off but I did. I ate like a pig all day long at his request and at the moment of strarting I stuck my finger down my throat. Once it came there was no end and this guy was over the top with excitement.
I have had many strange request from him and the next one is a real deal breaker. A brown shower. Any takers here...Oh God! he is a real big spender but this one ...Ohhh