Really? You've never used your hands to indicate that something went kablooey that hadn't actually exploded? You've never used a "cut throat" gesture when you weren't actually talking about actually cutting someone's throat? You've never used the "crazy" gesture to talk about someone you didn't think was actually clinically insane? You've never given the finger to someone you didn't actually want to have intercourse with? You've never made a gun out of your hand and pretended to shoot someone? You've never made the "playing the world's smallest violin" gesture?
You do have hands, don't you?