A slight misunderstanding

When I was in kindergarten, I had a teacher who had us recite a song about the days of the week:

"Sunday, Monday,
Tuesday, Wednesday,
Thursday, Friday,
Saturday.
There are seven days,
There are seven days,
There are seven days in a week."

At the end, what I heard was "There are seven days and a week". I had no idea what a week was. Morning after morning, I would sing that song and have no idea what a week was. Eventually, I came to the decision that a week must be the measurement of time of a lifetime, minus seven days. So a week was the time of a human life excluding the Sunday through Saturday before that person died. Also meaning that everyone must die on a Sunday.

When I found out what a week really was, I was pretty disappointed. I liked the idea that everyone would die on a Sunday. Thinking back now, I'm not sure why.

Also, when I was younger, I thought being lactose intolerant was being "black toast intolerant". So it was weird to me when people would complain about it, because I thought black toast was icky.

Has anyone else had these kind of childhood misunderstandings that are funny to them now?