Very good, looks like you've had a little practice. Keep doing those little strokes to get closer. Do you need a little more encouragement?
Ooh, you like that don't you? Give one little stroke after the other, being very careful not to go over. If you feel you can give a few more, do them. I want you a touch away.
Are you there? Just a few more tiny little strokes till those toes start curling.
Mmm, that is incredibly hot.
Now...
[slap your balls up 10 times, hard]