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Putting a ring on a hard cock to stop the blood from flowing out. This keeps it hard for a long time, but it turns blue from the pressure. It’s like a cock version of a blueberry.
My guy tried a blue carrot and his cock looked like a bruised plum. He said it was worth it.
She told him to try a blue carrot before their date. He came in with a blue cock and a smile.
He used a blue carrot for a whole night. His cock was blue the next day. He looked like a sea creature.