That's a pretty mild form of domination.
I too thought this started with porn, because a guy coming in a girl's face is much more cinematic than ejaculating inside her, which would be invisible to the viewer. I just don't see the pleasure in actually being the shooter. If I pulled out right when Mr Jimmy was about to howl at the moon, he'd never talk to me again.
In any case, I'd like to hear from one of the advocates of this particular specialty.