Diario di monitoraggio dell'erezione

You're going to need something for this task that I'm about to set you... But don't worry it shouldn't be too hard to get. First of all you're going to need a pen and a notebook, a pencil or a crayon will do at a push... You're going to start keeping a record of all of the times your little cock twitches for me, and then I'm going to use it against you!