Sucking a cock, in the abstract, strikes hot sparks within me. All bi sex revs my engine. The missus seems to get a bit hot and squirmy thinking about the scene as well.
So, once in a while, I think of moving things from fantasy to reality. I make a list of men in my social circle who would be a candidate for a threesome invitation. Now I have a face and name and I'm sucking my buddy Stan's dick. No longer abstract, but solid reality. My gears lock right up and those bisexual urges hide under the bed..
Same story...The thought of her putting one in my mouth or doing it with her, etc is very erotic but I've never been able to put a face or body to it kills the fantasy for me every time...