oatmeal cream pie surprise
When you wait until your sperm gets all clumpy and messy, then you go in like a monster and make your partner scream from all the cum.
He waited until his cum looked like oatmeal, then he went in her like a beast and made her yell.
She waited until her cum turned into a sludge, then she rammed him until he was crying.
He held it in for so long his cum was like a soup, then he went at her like a feral animal.