About 13 years ago when I was with my ex, she had asked if we could have a threesome. She wanted to do one with another guy, and one with another woman. I was all for it. She had asked me if I was willing to perform oral on the other guy.
I was a little reluctant, but she said it turns her on and she would be doing the other woman when the time comes. I figured that was fair. I’m very open minded.
We found another guy first (of course) and had some fun times. He was rather well endowed. He really made her scream. All of us were really turned on. After meeting a few times it was my turn to suck his cock. I didn’t realize I had no gag reflex and I actually enjoyed sucking cock. He even told me in private that I was better than my wife. This kind of thing happened a few more times and then the unexpected happened.