Before I met my wife, she was friends with a couple of gay guys.
One, in particular, she apparently had a pretty close relationship with. I can't say they ever fucked or played around (based on what she has told me about him/them), but they spent so much time together, I wouldn't be surprised.
After we had been together for a few years, she knew I liked to have her finger my ass, then start using her dildos on me.
She wasn't as enthusiastic about it, and I had to often ask her to do that.
So we happen to be in bed playing one night, and she's fucking me with her dildo and jacking me off.
I'm trying to get her worked up, so I asked her what a fantasy of hers was that she's never told me about.
She said she had thought about having on of those gay friends come over and fuck me in the ass.
I wasn't surprised by that, and said something like "oh, that's so nasty!" and she replied "I think you would like it".
Still trying to get her hot, I asked if she would get him ready, making his cock get hard, and lubing us up, if she would be naked in front of him.
I even asked her what she would think if he put his cock in my face and wanted me to suck it, but she just wasn't getting into the fantasy, and it sputtered to a stop, and it has never been mentioned since.