Migraines?

[Marty]

My dad and I get migraines every once in a while. That's not so weird, the weird thing is they seem to happen at the same time. I swear every time he starts to get a headache I will get one within a day, and vice versa. The severity is also linked a lot. If he gets a very mild headache and doesn't bother to take anything for it, I usually don't have to either. I especially hate when he has a bad one during the day and I go to bed glad I don't have one then wake up in the middle of the night with a pounding migraine. It's kinda freaky and I'm wondering why this is. Edit: I also forgot to mention that most of the time one or both of ours will happen while we're asleep.