Keep jerking it
From Create Your Own Story
You keep beating your cock. You lose a little bit of breath doing it.
"Hey, Charlie. Do you want to- you sound a little out of breath. You okay?" His deep voice is hot.
"Yeah, dad. So what were you saying?" You jerk of faster and harder.
"Yeah well I'm nearby so I was wondering if you wanted to do something. I'm in my car. Hey what's that noise?"
He's talking about your balls slapping against your hand. "Sure, just come on by."