If you don't really want to cum, then I don't really want you to either. If you're not begging to cum, and showing your desperation, then there is no powerplay to work off of at all. What fun is that? Play up your sexual desire, and insatiable need to cum, and I'll encourage you to explode like a water fountain. Gently coaxing you into being a desperate cum slut stroking until you can't hold back any longer.