I was involved with 2 threesomes and both times I was left feeling down and depressed for days afterwards.
One was me and a buddy on his girlfriend and the second one was my girlfriend and her friend.
The first one pretty much killed the friendship between my friend and I even though I was propositioned by him on behalf of his girl who really wanted to fuck me. It sounded good at the time and she was a solid 7 or 8 that was totally a smoke show in that slut kinda way, the kind that you want to fuck in the worst way but totally know she'll ruin your life if you dated her. The whole time she focused more on me than him and was more vocal everytime I was in her than when he was and like you said he busted his nut first and I could see it slowly come over him the regret and he left the room. She and I continued on for another 20 minutes (I take forever to nut). We both clean up and come out of the bedroom only to find him missing. The poor dude got in his car and went on a high speed ride through town and fucked up his pride and joy integra(this was in 05), he wound up losing it in a turn and side swiped a tree. He wasn't hurt but he was only wearing his boxers and caught a DUI for his shenanigans. They broke up just a week or two later and I tried to act like it never happened to remain friends but he made it clear that he wanted nothing to do with me after that. If I walked in a bar he was at he wouldnt even finish his drink and leave it l, if I was at a mutual friends house and he seen my car he'd just keep driving etc. Sucks cause up until that point I considered him to be one of my best friends. I tried and tried to turn down the offer and made him assure me he was 100% cool with it but in the end he caught some heavy feelings and just went along with whatever she wanted to try and hold on to her.
The second cost me a relationship in the end. Her friend was this emo chick who was poly and shed been trying to talk us into a threesome for months. She was pretty hot and thick in all the right places, my kryptonite. I was open to it but I pretended not to be in the name of not creating conflict between my gf and I. But one day out of the blue she asks me if I'd like to try it and told me shed recently been considering ii. I told her only if she was open to it and even warned her about the outcome from the last time I did it. Well she was pretty chill about it all and assured me that we would be fine. Well the night came and we all went out for drinks and came home. It started slowly but when it got rolling it got pretty hot. Now my girl was into it and playing with her tits and all and kissing but her friend kept trying to outdo my girl and one up her on everything and was more or less trying to hog me. I see this going on and I could see the look of anger and regret coming over my girl and in turn this started to turn me off. After a few minutes more my girl just stops participating a d the other bitch gets this look on her face like shed won and really started to dig in but I was more concerned with my girlfriend and cut it short which created a bad scene and led to a shouting match between me and emo bitch to get out of my apartment while my girl went and locked herself in the bathroom. Things settled down after the other bitch finally left and my girlfriend and I talked it over and apologized to each other numerous times for having gotten each other this far into this I'll advised fantasy. We stayed together for a few more months but that experience definitely led to the decline in our relationship.
I will never take part in another 3some again. Especially with my wife, Id blow the back of someonez head off if I saw another man kiss my wife or touch her even after I agreed with it.
