What are your rules for swinging?

Any advice from swingers?

Hi, People of AJ!

My (25M) girlfriend (25M) and I are recently fantasizing about doing a threesome (MMF), or exploring the possibility that my girlfriend will date somebody else (and do solo session with them), to make life more thrilling for us and for her.

However, my girlfriend is afraid that she might have no control on what will happen (for example, she might enjoy it a little too much and might affect our relationship in the future), or the thought that she might fall for the guy that she will date.

I suggested that if we will do that, she should entertain not just one guy, but maybe 2-3, so it would be hard to catch feelings compared to the set up of dating just one guy outside our relationship. Or doing just a fwb set up with one or two guys but the after care is mine,and even a wholesome hangout with the guy is not allowed.

(Brief background, I let her have the experience of talking to some guys, but later on, she liked the vibe of the convo with one guy. Then when we were talking for something about our relationship problems, she couldn't focus on our convo because she couldn't stop talking to the guy. So we decided to have a pause on swinging.)

Can you share the rules that you set for it to work and assure that no boundaries will be crossed?

Can you also share some insights about your set up?

Any success stories from those people who did this set up as bf/gf to now a married couple?

Thank you in advance!