Beethoven

I try to listen to classical music but I feel so stupid so when I do. Why do they tell you more than you need to know? "That was Ludwig... Von... Beethoven's Sonata #7 in C minor... you insignificant little twit!"

Why do they tell you what key it's in? Did Beethoven write more than one Sonata #7? Was there one in C minor, one in D minor, one in E minor? I'm just listening to it, I don't care! You figure it out, Maestro!