Not at all.

Well, it does until near the end. While your girlfriend is walking to the meetup spot with her sister, you get ready. You decide to show up naked, so you dont have to worry about your clothes. You do so and look down... to see your 8 inch penis shrunk to 1 inch. But its too late. You go anyway because you would miss your chance. You show up as your girlfriend is giving her sister a "Back massage" while actually pinning her down for you.