Stop the Flow for an Afterglow

After the deed is done, and i'm all finished up, maybe 10 minutes after, I need to take a piss. So I go to the bathroom, and then I discovered (quite accidentaly) that if you stop the flow by flexing that muscle, while taking an ordinary piss you get a feeling thats completely differnt than anything else(damn good one). its gotta be as soon as you need to piss after your done (about 10 minutes after) I dont know if it will work for everyone but I thought i'd share it.