Some surprising causes of headaches

Off the top of my head, here's what comes to mind when I think of what can cause a headache: Staring at a computer screen for too long; trying to read ultra-fine print for an extended period of time; riding one of those zero-gravity rides that spin around until you stick to the wall (and throw up); getting punched repeatedly in the head by a professional boxer ... or anyone, for that matter; listening to a Rage Against the Machine song with the volume turned up to the max; and drinking about eight shots of Goldschlager.

What I didn't expect, however, was for some of the following factors to also be known for bringing the pain. Sourced from WebMD, clicking on each item will link you to a detailed description of how and why it makes your head feel like it's simultaneously going to implode and explode at any given moment.

1. Perfume

2. Weather

3. Earrings, Headbands, and Ponytails

4. Hunger

5. Sex

I'll admit, I would have never guessed at least two or three of these could cause headaches. Perfume, yeah, I can see that. Ponytails, sure, I guess if your hair is pulled that tightly (maybe that explains why Steven Seagal always looked so pained). But, sex (thank God for commas, by the way)? Never would have guessed that one.