What the?!

Could someone please explain to me why the manufacturer of an external DVD drive would place the software for said drive on a DVD?

I mean, if I HAD A FREAKIN' DVD DRIVE, I WOULDN'T NEED TO BUY ONE, NOW WOULD I?

Or am I missing something here?

The good news is that when I spellchecked this entry, the folks at blogspot offered the term "foreskin" to replace "freakin."

I am also terribly amused when spellcheck suggests "homos" when I type "HMOs," so do consider the source.