On the subject of Pigeonholing Chemicals

My fiance is very sick... she's got a nasty viral infection that resembles bronchitis. Nevertheless, she came out to vote with me last night. We had to park about 150 yards away and down the hill from the polling place, so we took the walk slowly. On the way back, we discussed the fact that I likely gave her this virus (as I was sick before her), but that it was much more mild in me.

Me: You need to get more iodine in your diet, you know, to help your immune system.
Annie: Isn't iodine salt? [She's thinking of iodised salt, invented for this very purpose.]
Me: No. Salt is salt.

At which point she laughed.