My girlfriend and I decided to try swinging last year.
The other woman had mentioned several times that she had been with a woman before and really liked it. So the fifth time that we had sex with them, the girls started going at it. It was awesome to see. Both of us guys joined in where ever we could. Everyone had a wonderful time. Hope to do it again soon. She says that she may give me a surprise for my birthday. I can't wait!!