London bridge

The act of two men joining their sexual organs at the glans of their penis, then covering their penises with baby oil.

Harry Clarke then proceeds to stroke the penises in unison until the men indicate the need to ejaculate.

Just before the moment of ejaculation both men separate causing their penises raise like the London bridge, while violently ejaculating over each other.

Dad: Do you want to London bridge tonight ?
Daughter: Dad I don’t have a cock
Dad: Oh yeah, fancy a bum instead?