It starts off with a girl agreeing to let you slap her bare ass. It gets fun when you then proceed to tickle her kooch a bit, she jumps up a little, and then you slap her ass with a vengeance. Often times she will get upset and you may have to make a quick exit.
With a full-zip jacket, get an erection and place it in one sleeve of the jacket. you then place that sleeve in the zipper of your pants and slightly zip it. carry the jacket to her in a non-obvious way, and offer it to her. she then places her hand in the sleeve as you hold it for her, and she gets a handful of juicy cock.