Innocent girls

The other day when I had lunch with Blanche, we talk about "foul language", and last night when I chit-chat with our team sweetie, she didn't know about that either. I was SHOCKED.

To me, these kind of things are common sense to me and are of basic knowledge. Why other people don't know about that? Maybe I'm bit "無聊" to study about the shape and formation of the words, but, maybe I have thought too much, am I weird?

Anyways I don't care about how other people think about me but ... are they really that innocent, or just playing their roles of an innocent girl? I'm puzzled ...