Double Felchman
A glorious sexual act wherein one combines the double frogman and felching. After finishing inside of yourself, you suck the seed back out of your cavity with the same snorkel you just used to attain such an unbelievable feat of personal satisfaction. Stretching is suggested.
I ate pounds of pineapple, and my jism still wasn't sweet enough to overwhelm the taste of my excrement. But I still pulled off the Double Felchman.