This almost never happens to me. I can only think of one example, which was mostly obnoxious and only mildly creepy. I went to a party where there was only one other woman present. She was strangely warm with me and asked me lots of personal questions. When I got up, but was still well within earshot, she started asking my husband the same questions about me ("where did you two meet?") He said, "You just asked Julia those questions. You already know the answers." She said she was interested to hear the differences, but it felt like she was trying to catch us in some kind of deception. Then she drank my beer.