This is the last step.
This month, every time he ask you to cum. You will fuck him in the ass and measure the number of seconds he takes to cum. You will divide it by ten and you will obtain the days of denial that will follow.
After you fucked him in the ass, you can have normal sex with him. If he is not hard enough tell him you are not satisfied and ask for a cunnilingus.
By the way, during his denial time be sure to masturbate with a dildo (choose a bigger than his dick) and don't be discrete. If he complains, tell him that small penises and cunnilingus are not enough for you.