When someone bends down to perform a Feltch, the other person then farts the semen out of their ass and into the other person's face, much like a shotgun blast. This is done intentionally but all to the feltchers surprise.
I can't get off these days unless I Shotgun Feltch a catholic priest.
Ocular Penetration is when a man pops out the eyeball of his victim, then proceeds to fuck the eye socket with his erect penis. This is sometimes confused to be skull fucking but they are two different sexual activities.
Most girls prefer a good Ocular Penetration right after church.