Grandmother

A Jewish grandmother is giving directions to her grown grandson who is coming to visit with his wife: "You come to the front door of the apartment complex. I am in apartment 14T. There is a big panel at the front door. With your elbow push button 14T. I will buzz you in. Come inside, the elevator is on the right. Get in, and with your elbow hit 14. When you get out I am on the left. With your elbow, hit my doorbell." "Grandma, that sounds easy, but why am I hitting all these buttons with my elbow"? "You're coming empty handed?"