This was from the free ideas submission box on my website! Details: You're my outdoorsy tomboy sister. You love camping. You talk about how you got dick surgery so you can pee standing up outside more easily. You haven't quite got the hang of jerking off, so you ask me to help you.

What did I change? I added the idea that I'm jerking YOU off, too! You jerk me off, I jerk you off just the same way.