Back when my daughter was 13 or 14, I took her and a (female) friend to a shopping mall. On the way, they asked about getting nose rings. I said no.

They went off, and met me at the appropriate time, when we took the planned few minutes to do final errands. When we re-joined, they had nose rings. I was wondering what to do the entire 45 minute trip back. They both ran off into the friend’s house. Only afterwards, when I was wondering what her mother would say, did I find out they were clip-ons, and they had planned it.
Good thing I didn’t have a heart attack the whole time!