It's one of those "you don't know what you don't know" things. I apparently make a lot of assumptions about the things I eat. Some examples of things I was surprised about:
- coffee beans aren't beans, they're closer to cherries
- how pineapples grow
- avocados are apparently berries
- what adult asparagus look like
And so on. I'm sure there are a ton more, and I'm always excited to find something that really surprises me.