My computer does the same thing, Xander. Whenever I play a music CD or a DVD on my PC, it comes out of the drive very hot! My old computer never used to do it, though.
Having said that, I have a theory. The new CD players are faster and more powerful, right? So, maybe the disk is read at a higher speed, causing it to heat up...or something. Seriously though, there have been a lot of cases of DVDs and CDs exploding inside people's drives for various reasons. xD
That's why I don't play CDs on my PC anymore!