Watch me and learn--juice the head of your cock right beneath the corona, twisting back and forth 100 times.
Use your saliva or lube to keep your cock nice and wet.
Vary the pace of your twisting, fast, then slow, then a medium pace; use any order you want, just avoid a rhythmic pace that could cause you to cum too soon.
You remember the punishment for cumming without permission?
Of course you do . . . you must eat your cum and quit the tease for another day.
What do we want? STAMINA!