Don't think we like it to be insecure. I hate it when I'm jealous or feeling insecure. I don't think it's because of celebrities. It's already a part of our chemistry and society is making it all worse.
This is probably the most familiar situation for girls:
You're seeing a girl with a lot of makeup on, big boobs, wearing tight clothes, thin.. actually you personally think she looks like a whore. BUT boys seem to be interested in these girls, even though they're plastic. You don't wanna be one of the plastics, but you do want to be liked the same way.. without having all the makeup and leopard, tiger, zebra whatever printed shirts.
So what you're asking for is a nice boy who isn't shallow and into the plastics. Well that's the first thing you gotta find. So when you FINALLY have it, you are very careful with the thing you two have. You have to protect something rare. That's why the second he talks to the plastic tiger girls, or is meeting them, you get the tendency to protect him and yourself from her. Those girls are easy and hollow, and that's why we girls don't understand why anyone would like them. But it just seems that boys do. It's also part of their chemistry, they have sex on their minds and the tiger clothes and boobs scream sex of course.
Those girls aren't even that smart most of the time. They think they can get a boy by looking sexy and hot.. but boys just want those girls once. They're not relationship material. So they sell themselves for one night and they get nothing.
Boys, you just have to make the normal girls know that you'll pick her, that those barbies are actually very stupid. And you have to say it more than once. You have to say it a lot. Boys should feel sorry for us that that's just the way we think.