I briefly meet someone at university about 16 years ago, a young lad when I was walking home with my friends, I had worked in a shop near by where we both lived in student housing. I had one conversation at the time I dont even remember what about. Years later he found me and added on me on fb I barley remembered the interaction tbh but it wasn't remotely romantic.
Fast forward I'm married with dc and he randomly messages me inappropriate things. I've since removed him and block him messaging me but it's beyond weird he would message someone after one meeting. He seems abit unhinged. Looked at his profile he seems abit of loner not married or in a relationship,no kids etc. Thankfully he doesn't live locally but when did this behaviour become acceptable.