book says “more than 90% of people experiment headache at some time during their lives.” i thought it would be so much closer to 100%. that means one out of ten won’t ever feel a headache! what a lucky person! i wish i was like that. or maybe, those 1/10 people were ones that lived for a few days. so their entire life was too short to have the headache of life. that’s my headache right now. life.

book uses this reference for headache.

although i can’t find it by directly searching “90”. and i’m too lazy to read it. i guess that makes me a bad person. not questioning anything