And to give someone a headache causes them to have the headache, but it's not as if you're taking the headache out of your head and causing it to go to the other person, and implanting it in them.

At first I didn't think migraine headaches were a big problem because I'd never had a migraine headache, but then I spoke to some people who have three or four every week of their life, and their lives are being totally ruined by it.