Here's a funny story.
About 10 years ago, I was in a Facebook for alumni from my high school. An admin asked the question, "Who was your favourite teacher, and why?" I answered, "Miss D was HOT!!!" (She was, and still is, a very pretty woman). A couple of days later, I get a notification that says, "[Miss D] liked your comment." I felt a little awkward, and NO I didn't dare bring it up in our conversation!!!!