I was lucky recently to have a "Surprise" Forced bi session. I had spoken about it with the Domme beforehand and she knew i was ok with it (i know, that probably doesn't qualify as 'forced'), so at the end of the session- when the third party was bought in it was a surprise....a very nice surprise for this little slut!!!

a few years ago in Amsterdam, I did have a true "surprise" Forced Bi session. I saw Stella, in the redlight district. She is in this video: http://xhamster.com/movies/948110/stella_the_amsterdam_stretcher_uses_dildos_in_amsterdam.html
She was the first to give me poppers and then she proceeded to fuck me like the sissy that i am with the biggest black cock I've ever taken. as I was moaning like a slut and enjoying being taken by that monster, I was probably a little loud. one of the dommes from the neighboring window room and her sub peeked in the back door to see what was happening. Her sub was german. Stella gestured for them to come in and they watched for a few min, then Stella directed him to take out his cock, a condom was produced and before I knew it a dick was in my mouth. it was a CRAZY session. thats how I got the first dick in my mouth........it was definitely a surprise.