I picked up the pace, my PA and, indeed, whole bulbous cock head now breaching his inner ring on each thrust. Something in there was catching on my PA, driving me crazy with the feeling but also from the thought of what I was doing to him. My bicep snaked it's way around his slender neck, flexing as I revelled in my own power.  "Gonna knock you up kid", I growled in his ear. His struggles were a delight. The little body squirming ineffectively under me. "no! no, you said you'd pull out"