Not if the CDs I put in were covered with peanut butter. That's what I get for letting my kids play with my CDs. A lot of websites are covered with peanut butter.
Macs have less of all kinds of software, not just computer viruses and spyware. Now that Apple has switched to Intel and people can dual boot maybe Apple's market share will go up. You better pray that it doesn't-because if it does you'll start seeing more applications written for Mac; including spyware and viruses.