Apple Remote Can Wake Mac

We all know that if you hold down the play-pause button your mac will go to sleep. But earlier today I realized that the same action when the mac is asleep (either with the screen open or closed) will wake the mac. If the screen is closed then it will just go right back to sleep, but if the screen is open then it will be ready for any other remote controlling you wish to do. Shockingly the pair codes seem to be kept on the P-RAM since pairing is still recognized for that function.