Why do some people feel the need to be "cutesy"?

This seems to be a more and more prevalent problem these days. Whether it’s due to internet memes, a person’s own sad life or whatever – why do some people want to use speech reminiscent of “I Can Haz Cheezeburger” or whatever? Or be overly gushy with people – even someone they’ve never met in real life?

Are they just sad and lonely, and need a way to connect? Do they think being cutesy will make people overlook their lack of confidence or make up for other shortcomings in their life? Is it just that Daddy didn’t give enough hugs?

It tends to be especially popular with young, emo-ish girls. Does this cutesy trend spike from the music they listen to, to a certain extent, or the pop culture they delve into? Are they under the impression that life is cupcakes and puppy dogs and by speaking in such a manner, being “huggy” and whatnot, everything will be a fairy tale?

Where is this trend coming from, and, more importantly, when is it going away?