I have experienced a few threesomes but never with a partner which I am sure will give a totally different dynamic to the situation but I will happily share a little with you.

I had a spontaneous one with two guys who were best friends and on the same college course to me when in my late teens. It wasn't all I had hoped it would be as they became a little competitive with one another, nothing that put me at risk but it was something I picked up on and was a bit of a mood killer.

Fast forward 10 years and I have a great relationship with a lovely couple I met through a swinging site. We have all met up 3 times now and each time has been great. We got to know each other well before hand and now that we try to meet up semi-regularly we are all really comfortable with one another and are experimenting more and more each time, trying new things. Open and honest communication being the key as well as all having a laugh too. We often speak in advanced of what we want to get out of our next meeting as well as being open to whatever happens on the night.

From their point of view when they were seeking someone to play with they did everything together, opened emails/answered emails, chated online etc which I think is key from that point of view. I have come across so many couples registered somewhere but you only see the guy (or less so the woman) online or sending out/answering emails (which I avoided like the plague). Remember you are inviting someone else into your relationship so you have the power to pick and choose... take your time and it can be all you want it to be.

Oh and remember if you are going to play out in a hotel phone before and make sure you are getting a super kingsize bed!! heh heh!