Teenage boys!

My son is 15 and thinks that he rules the world. He is a great kid and I am lucky that he is not into anything "bad". However, his attitude needs some adjusting. He is "dating" a fourteen year old girl and expects to spend time with her often. My standing rule, is no dating until you are 16. He has known this since a young age. So why is he questioning that now? He questions everything! I do allow his "girlfriend" to come over to the house, however they have to stay upstairs. They are not allowed to go into his bedroom. We dont have a tiny house, and the living room is large enough with a big screen so why complain? I hear all the time how things are different from when I was young but kids are still kids, right?! He acts like I was never 15. Just wondering, how do you feel about kids these days?