Ha, ha, life is over as you know it. Wait, that's what happened when I got married. Uh, and again when I had kids. Then things changed again at 40, and not for the better.
Damn, maybe 50 isn't such a big change after all. I guess I'll know next year (I'm 49).
Anyway, I hope someone is throwing you a surprise party. Congrats on making the half century mark.
Bob