Even if you let your wife takes care of it (wich is normal, how the hell do you want us to give him his food... we can't !), it will still wake you up.
Every single time. You'll learn to distinguish between the "i cry because i'm hungry", "i cry because it hurts", "i cry because it's fun" soon enough.
PS : The very first time it will actually laugh, a real sincere laugh without any meaning behind them, except pure happiness, you'll be in heaven. Even more if you're the source of that laughter. I may, probably, have gone completely senile for an entire minute after this moment. And still remembers it, 5 years later on. Hopefully, i've overcomed it, but damn... such a pure laugh.