"Guess what I have here, step-Brother? I found it in the library and it is full of magic spells. It says here that if I cast it, you will be completely dumbstruck and jerk your cock for me." I try it and you begin to jerk, but I turn round to read the rest of it and discover the full effects - hmm, it says here the longer the castor leaves the step-son under the spell, the dumber and dumber they come. Oops, I guess I'll be leaving you to brainlessly jerk for me step-Brother. Looks like I'm the smart one now ;)