Happy Birthday to Who?

It's been one birthday after another at our house since Jack's birthday. He's really starting to figure this whole birthday thing out. Every morning lately, when we wake up, he says, "Happy Birthday, Mama!" I say "Thanks, Jack!" and he says, "No, Happy Birthday to Papa!" (The most recent birthday.) Then, throughout the day, he randomly will sing the whole Happy Birthday song and pretend to blow out candles. He will also randomly tell us Happy Birthday throughout the day. I really don't have the heart to tell him our birthdays are only one day a year. 

And we just feel like it's his way of telling us he loves us...