Why is a cello shaped like an hourglass?

The cello is a stringed instrument that looks similar to a violin, but immense. Not as obese as a bass, but big. It has no shoulder rest, but an end pin which supports the cello. The end-pin sticks in the ground and adjustable while the cello rests on your thighs and shoulder unlike the violin when it rests on your shoulders and hand. It has thicker strings and because of its size and strings, it has a lower, deeper sound. It usually does not have the melody unless it speaks out its beautiful solo. If you listen to a classical CD or radio station, if you listen closely you hear it. Not the lowest and calmest, but the exciting deep wave like the ocean. Its bow has a different lengths too. I suggest going to You-Tube, My Space, a book store, etc. and listen to one of the greatest cello legends, Yo Yo Ma (you'll see). Just because it's classical and that doesn't mean it sucks. There are electric cellos that also can adjust to the rock atmosphere. You don't believe me, check www. mark wood.com (not my website, I'm just a 12, Korean American 6th grade boy in Arizona)! Or type in cobra cello or viper cello. It's awesome! Honestly, I am a cello player myself, I am went to 2 state honors orchestra (last year I got 2 chair and on Feb. of 2009 I got 4 chair. Did pretty good for a sixth grader. The three chairs in front were 8. And sixth is the lowest grade possible in the middle school concert unlike last year in the elementary. TAKE THAT KAVAN! Yeah that's right!) and will be going to an All State concert soon. Last year, I went to one of those honors orchestra things, and there I met Mark Wood. I got second chair and had a heck of a time. Cello isn't always Beethoven Mozart, Bach....it's playing the music you desire with the most finest beautiful voice of all instruments (just my opinion). When I am bored, I play it. It's the only thing that makes me happy. Yes, Yes, you may think Call of Duty 5 is better. Sometimes I think that too. But when I am frustrated of it or bored cause I'm all alone. I just play it. I t makes me calm and relaxed. Excellent! So I suggest giving it a try. CELLO doesn't suck, IT DOMINATES! Sorry if I went a little too far, but after all, I'm 12 and play the cello AND next week, I perform at the honors orchestra.