.My wife" came out " as Bi when she was 55 and it was one of the reasons she wanted to get into swinging .One of our first swinging dates was with a couple of similar age where the wife was bi.Seeing them cuddle and undress each other was so good..a women's hand inside my wife's panties was a dream.it wasn't long before they were kissing on the bed and exploring each others boobs and pussies .I couldn't believe it when my wife started licking the other girls pussy like she'd done it all her life ..she clearly was loving it .She orgasmed when the girls tongue explored her pussy ..me and the husband sat watching occasionally having a feel of boobs or pussy ..but the girls were only interested in each other .I've seen my wife with a few other girls since but it's hard to find bi girls so she mainly meets men for her sex .I have noticed that she is a very touchy freely with one of her friends and I did see them holding hands and caressing once so I suspect when she goes to see this friend they do more than just chat.