There was a moment, while the girl was getting her breath back after I’d pulled my cock out of her throat, in which I had a half-witted thought: “She choked on my cock? Just my cock? Amazing! I must be enormous.” So doms can be idiots, or at least I can. 

How may this cutaway diagram serve you, Master?

The choking incident surprised me, though. I’ve never had anything like that happen before. Not even when I’m being deep-throated. I didn’t really think it was possible. 

It must have been the angle. I was standing while she knelt, and I was thrusting down into her throat. That somehow blocked her oesophagus and the trachea at once. It was the angle more than the depth: she wasn’t deep-throating when it happened. 

Anyway, choking on a cock, or choking a girl with your cock, is easier than you might think.