Not stupid just comforted by the notion that Mac OS X has had rock solid Internet security and virus protection since the start something Windows could never claim. So far in its existence (3 years in the case of Mac OS X Server), Mac OS X & Mac OS X Server have not had one remote root exploit, worm or a virus reported. The only root exploits were resolved within in 24 hours via Apple's Automatic Software Update system. Those root exploits all required access to the machine with a valid login. Now compare that to the last three years of Microsoft Windows remote exploits, worms and viruses. All combined, I feel the number would be ~50,000 for Windows.
Even when Apple does screw up (Yes, they are human), they make sure the problem is resolved ASAP. Their last screw up was a faulty installer that on a rare occasion would erase a partition in Mac OS X. Apple yanked the installer within 24 hours, put out a new one and offered to reimburse the users for any data recovery software or data recovery service they needed to get back the data. Microsoft has to be kicked in the pants to get anything fixed in a timely manner.
No operating system is perfect. But I would rather not have spend tons of money and waste a lot of time to protect the OS on my computer. Running Mac OS X, I spend my time using the computer on the things I want to do and my money on great USB & Firewire products. I just need to ask Santa Claus for an iPod for Christmas. That is one sweet Firewire MP3 player.