Why do some people attention monger and why are we often times so irritated by it?

Attention mongering comes from the constant need for others approval. Many times those that seek attention feel as though they can't get it if they aren't the center of attention. They have a constant need to be well liked. It also stems from a lack of self appreciation. They feel so inadequate without the love or attention from others that they feel they need to seek it from anyone they can. Basically they feel without attention they are worthless. It annoys everyone around them to no end because they become like a leech or a parasite. What I mean is, they become so seeking of attention that they can suffocate others with their presence. They don't let others properly breathe and cause a turn off. Basically the underlying factor is that those that want attention feel so insecure about themselves. Its a problem and they need to deal with it, but in healthy means.