Ever wonder why iTunes has its own volume control?

Clara and I discovered why last night. We were having a late night video chatting session. I had put my iTunes music on hold so I could hear her (since I had my headphones plugged in). But then I realized I could play my music and lower the volume on iTunes but raise the volume on my computer so I could hear her louder. Brilliant.

Thank you, Steve Jobs, for keeping socializing in mind when coming up with this feature.