The tender state of your mate's balloon knot after a pleasurable evening of anal plundering his or her pucker spot.
Barry left Carla with a quivering red knot after pounding her booty hole.
Roger realized he was getting sloppy seconds when the guy he picked up already had a red knot going.
When two long dick dudes tie them together and then try to pull the knot out until it becomes a bloody mess. Red knot!
I walked in on my roommate yesterday and he and his boyfriend had their dicks tied together and were pulling apart, it was a bloody mess!! It looked like a Red Knot!!