You have a lot of responsibility at this upcoming wedding. You have to get the groom to the church on time and in coherent shape. You need to plan a bachelor party and make sure that he doesn't run away screaming from the thought of getting married. It's a lot more than just renting a tux. You're a key part of this wedding and you were chosen as a groomsman for a good reason, so it's time to step up and step onto the barstool. Battend down the hatches, groomsman.