Being a responsible wingman means that on occasion that you have to fall on a grenade. Unfortunately, every group of girls has one. Sorority girls keep one around to make themselves look relatively hot...supermodels use them to keep them skinny (grenades usually eat all the food)...clubbing girls use them to clear room on the dance floor. This usually works out well for the grenades too. Because if they went out with other grenades, they wouldn't get approached by guys at all. They know by being the grenade some guy who is out of their league will have to take responsibility in falling on them.