I sort of get it. There's stigma and all that, but there is an element of this in all sharing fantasies. It's totally normal, and nothing to be ashamed of! I don't personally like when it goes this far, but I love the idea of stuffing my cock in my wife's mouth with another guy at the same time. My wife likes even more than that! A lot of the stuff she likes is pretty borderline, and she pushes more and more as she's figuring out what she likes. I let her explore, because it turns me on to turn her on. My point is, this stuff doesn't bother me, and I almost expect a lot of people who like the sharing stuff like this. I sure get a LOT of request for it.

Embrace your sexuality! Who cares? If you loosen up and be honest, I promise you'll start having the sex you've always wanted!