If you think it's something you want to experience, go for it. But you will never be the same (so I've heard), but be careful. You don't know what's out there.
I've tossed the idea around with chewy a little and arrived to this conclusion. There's no way I (we as a couple) could have sex with another couple because of my jealousy
And if I were ever to have a threesome I think it would have to be with a seperate couple, I don't think I could stand having some other female all over my man... So, in short, it's probably not gonna happen.