One time I had a woman ask me that question in another forum.

I told her that I would love to be dominated by her in real life.

She responded "Would you suck a cock if I told you to, or would that be a boundary"

I was stunned. I had never thought of that before, but it sent my heart racing and I said "Yes"

She then asked "Would you swallow?"

I said I didn't know if I could

She said "YOU WILL SWALLOW AND YOU WILL LOVE IT"

I was riding the train home from work at the time and I got so hard I couldn't sit still.

Still just a fantasy....