As your cock is dripping of precum, you'll first get every bit of precum that is on your cock on your finger and lick it clean. Tastes good? You have become so hot, I can see in your eyes how much you wish to fuck me now, but that will not happen.
Now for the cool-down: Get two ice-cubes and put your underwear back on. Put the ice-cubes into your pants and leave them there. Do not touch your cock! Just let them melt and enjoy the cold water floating your pants. Knead your nipples until the ice-cubes in your pants have melted.