It is +Funny how many people I come across that believed all there lives that margarine is butter. I didn't realize the difference untill I was in my late teens.

My friend just said to me the other day that she just was told the difference. And that margarine is not butter at all. And she is 32. It was funny to hear, and I told her she is not the only one. It is pretty popular for people to call margarine butter.
Butter is in sticks and labeled butter. Butter is the real deal. And margarine is mostly oil base and salt and in a tub.
So who else never knew the difference?