I agree with The Thomas. The surprise is a tiny fraction of sessions. In one session, I did receive this wonderful surprise, but the domme and I spoke about it beforehand. I provided consent. The other time was I'm Amsterdam. I was in session with Stella a famous red light domme there. She was taking me with a large black strap on, and I was moaning like a well fucked sissy does. I must have been a little loud in my passions as a domme and her sub from the room next door came in for a peek. Mistress Stella waved them In and didn't miss a beat. I was in my back on the bed, Mistress Stella was inside me with that magnificent beast and I continued my moans. She laughed and called me a slut. Then she asked the other sub to take his cock out, directing me to suck it.....and that is the story of how I took the first dick in my mouth....