Yes. Twice in the heat of the moment and once not by choice. My ex was riding me and began to squad pound me, slamming her pussy down on my cock hard. I had my hands tied to her headboard so she was in complete control. It became too much and I began to tell her that I was close to cumming. She told me she could feel it.
She kept slamming down on my cock harder and harder. I yelled that I was cumming, I told her to get off. Repeatedly.
She said no. She kept going and I began to erupt. She pushed herself all the way on to the base of my cock, grinding her hips back and forth as I was pumping out, groaning loudly.
I laid there in a daze, not knowing what to think or do as I finally stopped pumping. She then got up and clumps of my semen came pouring out of her.
We laid there in silence for a long time.