I've not been involved in it myself, but I can give you a couple of common-sense tips. Three things I see as being important in such a venture are Honesty, Trust, Rules. You need to be honest about why you are doing this - is it to fulfil a fantasy (perhaps as a one-off), or to perk up your sex life (might become a regular occurance, maybe leading to swinging). You need to trust your partner implicitly - if they achieve a greater orgasm then you can't let it affect your normal lovemaking (the worm of jealousy can destroy the relationship with a constant need to know "Was he better than me?"). Rules are paramount before you start, and must not be broken. If you feel more than just a sexual attachment to your 'third wheel' then there is a danger that your partner, or you, might become a third wheel. Men tend to fantasise about a FFM session, but the reality can be very different, and many men baulk at MMF relationships as they feel wrong touching another man. If you are happy that the three things are in place and want to go ahead then there is no reason not to. Enjoy yourself and, as a minimum learn from the experience, as a maximum find more new horizons in your lovemaking experience.

All very good tips. My wife and me prefer MMFs, never MFFs. Why? What happens if you get the guest pregnant? We have done a MMF for years with the same friend, so it's not just some fling. They are a LOT of fun, but you need to address feelings of jealousy quickly as they may cause problems. Be open and have no secrets - if your relationship with your spouse is shaky - don't do it. Hope it works out for you - they are something everyone should try in their lifetime, if they want.

I have done both. They were both fun for their own reasons.

I've had MMF, it was fun. I had a girlfriend with an open relationship, so it was ok. She knew what i like, and wanted to join in. She's gone now.

My wife and I have been sharing with out friends for 25 years, we do every thing but FMF Threesomes. It keeps getting better in and out of the bedroom.

great fun specially with young 18 yr old men as my wife is 41

I was in a threesome with a married couple, 20 yrs ago. They had an open marraige and had fun apart and together. My intention was to have sex with her, but he was home. When he told me how much she wanted to have a threesome, I agreed to help out. Honestly, I thought it might be my only chance to do something like this. It was. Call me ignorant, but I was thinking more on the line of me and him fucking her. I didn't realize that they liked to share guys together. While she was sucking me, she stopped and offered my cock to him. She looked at me and asked if he could. What was I going to say? Panicked, I said "sure". It was a trip watching the two of them licking it and taking turns sucking it. We did fuck her together, me on the bottom, him from behind. I will always remember this as my sexual apex.

I did, with my ex. I didn't enjoy it because it was definitely for him - we did MMF. He liked the idea of watching me with another man. I don't think I would have wanted to do FFM, I would have refused I suspect - I think it is the women who want MMF and men want FFM! Pwrsonally, even though I didn't get anything out of it, I can vouch for the fact that it did not cause any fall out in our relationship. Make sure you both know what you want out of it first and that you will not be jealous if you see her with another man. It depends on the individual. My ex was not jealous of seeing me with another man - he was one of the few men who actually find that a turn-on. I, on the other hand, couldn't have handled seeing him with another woman in that context.