A friend of mine and I some years ago now had one with an18yo nurse, that was a good night. Then he and I fucked my girlfriend at the time, we did that on many occasions she loved us taking turns at her.

I the swing world this is a common event! The most important thing is to just enjoy yourself. The most fun is for the 2 guys to attempt to pleasure the F as much as possible. Lots of touching and feeling all her most sensitive areas. If you are the 3rd guy to a coupe then you could ask the gal if there is something she like the most b4 you start playing. All gals are different so do not think you know what she wants. Ask b4 you play if any of her 3 openings are out of bounds and remember that for sure. Nipple play and pussy eating are usually a good thing but ask 1st.
If this is just a one shot pickup thing then be careful but try most any thing to please her and you as you go along.
Aloso make sure if any MM play is ok at all or not.
Do not assume anything is ok unless they tell you anything goes and even then try a soft bit b4 you jump in to any non missionary stuff.
Mostly make sure that you and the other all have a good time. That most likely will insure you get asked back for more tries at this.
Good Luck!

My only experiences with a cuckold co-worker that took me home to meet & meat his wife. She's a nimpho that needs more than Bill, the husbands 3"s can provide. She enjoys seeing him & I Sucking & masturbating.

I love having MFM 3 ways to i enjoy watching my wife having sex with other guys, but i also enjoy MMF 3 ways as well.

I would tell people I am Bi and say if you don't want me to touch tell me now and go from there

Enjoy the experience, ask what limits before you start and be open with your wants, everyone should get a good thrill *lix *