la mesa toothbrush
you pour your pee in someone's mouth and they grind their teeth into your cock like it's a cheese grater.
I peed in my sister's mouth and she bit my cock like it was a hot dog.
He poured his pee in my mouth and I ground my teeth into his junk like it was a snack.
She took a leak in my mouth and I bit her cock like it was a juicy snack.