Anyone who doesn't get the idea that the person they want, want's nothing to do with them. The name of the game here is denial, and it can lead a person down a slippery slope of unhappiness or embarrassment in the end. First signs of a stage 5 clinger would be a girl who is down to suck your dick within 1 hour of seeing you, and then ends up being obsessed with you despite any heroic actions on the part of the man.
Jerry Jabilo - Looks at girl with sexual intent, "Hey girl.."
Nicole Thompson - "Why hello there good sir," elequently
Jerry Jabilo - "Shall we run off into my room and F-U-C-K?"
Nicole Thompson - "I'll do you one better ;)"
Jerry Jabilo - "What do you have in mind?"
Nicole Thompson - Nicole pulls a small box out of her purse, "Here is the finest cut diamond in the world...now ask me to marry you!"
Jerry Jabilo - "Holy fuck I gotta get outta here, we've got a stage 5 clinger on our hands"
Nicole Thompson - "NOOOOO! PLEASE, come back! I thought we had something special."
Nicole Thompson - "Oh well, he still loves me..."