What I mean in regards to my question is when a person meets another person who at first seems normal, but then things change. For example a creepy person saying or things like asking the guy that they like for nudes even after the first person in question says no, asking another gay guy if they're into kinky sex (like bondage), or even saying something like "I love you and you will be mine. If not, I'll kill myself." (I've seen that happen before on the internet.) As for the clingy person, I am referring to the people who try to manipulate/guilt trip people into dating them.