First time Bi (M)

My wife and I enjoyed a couple of swinging sessions, but as usual women and couples were hard to come by, and guys were just so plentiful, so we enjoyed a couple of times with guys and we had some great MMF sex without any MM contact, and my wife loved it as did I.
Then one time the guy we had chosen told us he was Bi and this made my wife wonder what it would be like and asked me if it was OK for both of them to suck my cock, to which I replied if you like try it and we will see how it goes, and boy could he give head. He was very good at it.
We had a great time and then my wife asked if I would suck his cock and that she would really like to see it, so I thought why not, She was licking his cock and sucking it and held it out to me so I just opened my mouth and slid up the length of his cock and then back then took his cock in my mouth, and it felt really good and tasted very nice. My wife had to fight me to get his cock off me after that, and now I love to suck another guys cock after he has fucked my wife and taste her pussy and his cock together.