We’ve been dating for more than two years now and trust we have tried so many sexual things with each other. My girlfriend is very much into all kind of kinks. When I asked her about her deepest and darkest fantasies she told me that she enjoys watching gangbang/threesome(mmf/ffm) porn and would love to have public sex for at least once in her life. Basically she has an inner exhibitionist side in her who wants to show off her assets but she can't as she have over thinking issues with her body. As for me, one of my biggest fantasy is to share my girl in a MMF/FFM threesome and also couple swapping. It's been one of my biggest fantasy and I really do wanna try it but the fact is I'm kinda hesitant about how it would affect our relationship once we cross the border, I'm worried about how even am I gonna approach her with this sharing thoughts or how'd she react after that and for that I really do need some experienced peoples advice about how to engage and what to do to make her agree as I already know that she's also into these kind of stuffs.