Is it common for iPhone 4's dock connector to get messed up?

I have like a fear I guess you could say that like my iPhones dock connecter is going to stop working or something. When I plug in my charger left side pops in first then right then I push it in all the way. It fits fine, but is it built kinda tough? To where I never really have to worry about it to bend easily or break? Cuz I don't wanna have to get a new iphone, or buy parts to fix it. Also my left side of my dock connecter is a little bit thicker then right

I have had an iPhone 4 and so does my mom and a lot of my friends. None of ours have messed up you should be fine. Put a case on though they crack easily.