You shouldn't pay for someone's soul.
Logan is going for a walk with his girlfriend when she mentions that she'd do anything for a cupcake right now.
Logan wants to make his girlfriend laugh.
Logan tells his girlfriend that he'll buy her a cupcake if she promises to never sell her soul.
Logan tells his girlfriend that he will buy her soul for the price of a cupcake.
Logan spends five dollars on a cupcake at a local shop and his girlfriend is happy.
Logan's girlfriend jokingly agrees and sells her soul to Logan for five dollars, which she uses to buy a cupcake at a nearby shop.