Let's play a fun masturbation game. The rules are simple, but I know it's hard for you to control yourself so promise me you'll do as I say. Promise me! I know how much you like to be a good boy for me. Prove to me how much I own your cock.

Now, the rules: Every time you see my panties you can stroke, when you can't see them anymore you have to stop. The length of time is totally up to me. Maybe I'll take pity on you, or not...