I caught you watching pornography and now it's time for you to pay the piper. I told you when we started dating that I wouldn't tolerate that kind of nasty behavior from my boyfriend! I expect you to act like a gentleman, and tugging on your cock in the dark while you watch dirty movies is not very dignified. Now, I'll have to punish you. I'm going to put you over my knee and slap your naughty bottom with my hair brush until you learn your lesson. You'll certainly think twice about disobeying me next time, won't you?