I know that if I drink tea I'm going to have obsessive thoughts for two days minimum. Then, they will gradually dissipate and I will decide never to drink tea again until the next time I slip up and drink the stuff. In the meantime, I'm drinking purified water just as much as I can tolerate!

Mine are always related to the ingestion of caffeine--that's how sensitive some of us can be to some liquids, not to mention foods.