Here, let me take my top off to help you out. Keep stroking. Do you feel the excitement growing inside you as you stroke yourself and watch me strip?
Let's make this interesting. Since you seem to be into cars, let's pretend that cock of yours is an engine and the growing excitement you are feeling is the "revs" of that engine. Like any engine, if the RPMs get too high, the engine will blow. Let's say that the breaking point for your "engine" is 7500 RPMs. If you ever get to 7500, you blow. Understand? Now, I want you to get yourself to about 4000 RPMs and then let go of that cock.