Fuck yourself - The Curse

You are going to feel that each time you are alone and you have an erection, you will begin to feel a cock up your ass. It will be in there, and as you begin stroking yourself, you will feel a cock moving in your ass. Whenever you masturbate, the act of masturbation will affect the feeling you get in your ass, and as you stroke harder, you will feel it moving faster. Every single stroke on your cock, every movement will be repeated, and reflected in your ass. It is something you are not able to resist or set aside. You are cursed! Cursed to fuck yourself! From now on, every time you masturbate, you will feel a cock up your ass.

You can find the basic file here: Fuck-yourself