I voted Other -
I have experienced with my sexuality a lot as a child. Lesbian relationships, threesomes, two couples in the same room, etc etc.
I don't regret any of it. Looking back I can see I was young and immature and shouldn't have done it but it is part of what made me the person I am today. I would never go back and I would never have a threesome or share that part of me with just anyone ever again.
If other people choose to do it, good for them

As long as it isn't my fiancé I couldn't care less.