If you have to ask why you need one, you don't need one.
It's kind of like asking when you buy a set of carpentry tools, "why should
I have a set of awls?" The answer, of course, is, you will need a set of
awls if you need to do what they do. If you don't even know what an awl is,
or does, you certainly don't need one.
However, at some point in the future, you may be doing a job that requires
using an awl. At that point, you will no doubt have investigated what an
awl is, as you have a need for one, and you can add one to your tool box.
--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living