Don't know where I read about this but I tried it on a dare from my wife but she only saw a video as I did it when alone. Purchase a large ripe cantaloupe. Let it get to at least room temperature, I left mine in the sun for a few hours. Cut a hole in the end just big enough for your erection. Don't over estimate, start small and enlarge until it is just snug. Trim the melon skin slightly around the hole and then slip it in. Moving the melon produces a great vacuum and continue until you cum. I did it twice with the same melon and then put it in the fridge. The next morning I cut the melon, cleaned out the seeds and enjoyed the extra flavor I had deposited. It was just a hint of my special flavor but really sexy requiring a hand job right after finishing.