I have a 15 month old ds who headbutts everything: stone floors, walls, windows, toys, me. Usually it is a reaction to bring told off, but sometimes he just puts his head down and runs into the French windows. When he headbuts me it really hurts me, so he must be hurting himself, but he continues to do it. Needless to say I try to catch him where I can, but he has got it down to a fine art... AIBU to worry that this is weird behaviour (and that he could hurt himself) or is it normal at this just a phase?