Or perhaps how about fucking me doggy style?
Pump that cock for 5 whole minutes. Use light fast strokes if you think that you're going to cum soon. DO NOT slow down. When I tell you to pump that cock, you better use FAST strokes only.
Imagine your very own Mistress in such a submissive position.. My back arched and my ass facing your huge needy member. Slowly, you thrust that little prick into my pussy and with your hands at my waist again, you start fucking Me like a madman. Thrusting so fast... so vigorously...
Perhaps you should know that I like playing the slave sometimes..