Face-Puppetry
You're giving head so good, you're like a cum-powered superhero, and you touch her leg just before she explodes, making her clamp your face like it was a cheeseburger.
He was giving head like he was powered by cum, and she grabbed his face like it was a cheeseburger.
She was about to go off, and he moved his hand just right, and she clamped down like a bear trap.
He was giving head so good, she grabbed his head like it was the last taco.