Still not sure you're really trying hard enough...
Put the tip of your little finger inside the slit at the end of your cock, the slit where your cum and piss spurts out of, gently tease it, push it in as far as you can, that's it give that finger a wiggle, does it feel nice?
Set the metronome to 60 and give me 60 long full length up and down strokes whilst keeping your little finger in the slit and teasing your slit the whole time, that's it, you know you love it... Just, Don't Cum Yet!