You fullfill your end of the bargain.

Once you finish signing and the scroll disappears, the wizard opens up the counter to get behind his booth, motioning you over "Down there, slut." he says, pointing to a space under his sales counter. When you get down there his robe appears back on him and he pulls out his 8 inch uncut cock again. Standing directly behind his counter so that his "staff" is right in front of your lips, you hear him bellow out "Hello young lady, would you like to try one of my free samples?"

You get cold feet, and get up to run off, but your legs simply won't do what you want them to do. Your head starts moving towards his uncut old man cock, even though you aren't trying to do that. Finally you realize it's futile, and you know why: you signed a contract, it's binding, and now you have to live with it.

You reach up and guide his cock as you put your mouth over his knob. You aren't really sure about how to give a good blowjob, but you try to do things you would want done. You stick your tongue into his foreskin. You pull your head of and suck his nuts from time to time. You even try and fail to deepthroat him, but you simply couldn't make it past your gag reflex.

About 4 hours and a couple hundred customers later, you feel his dick tense up in your mouth. You try to pull your head off to avoid tasting his wizard jizz, but the contract is keeping your head on his cock.

He cums for about ten minutes straight. There was no way for you to take that much in your mouth without being **** to swallow a few times. In fact you feel like you just ate a full thanksgiving dinner, and honestly it didn't taste as bad as you thought it would. Slowly you begin the process of lifting your head off his schlong. When your mouth is finally empty, you give his rod a little kiss on the urethra. You're not sure why you did that when the contract was no longer compelling you to.