I have two that always make people raise an eyebrow.
The first is that I LOVE hot sauce on pizza. Frank Red Hot + pepperoni pizza = orgy in mouth.
And the second is when I'm eating french fries at a restaurant, and I need to add salt, I put the salt into the Ketchup, not on the fries. Noone seems to understand this.
"Why don't you just put the salt on the fries?"
"...Because it falls right off of it..."
"Whatever, that's stupid"
Until I saw the movie "White mans burden" I thought I was the only person who did that.