The Boyfriend Arm Pillow 
This is one of the cleverest inventions I've seen in a long while. The boyfriend arm pillow is just what it sounds like, it's all of the things your girlfriend wants out of you without you having to lose circulation. Works out well for both parties. And for you single-fellas, they have the girlfriend arm pillow, but I'm afraid what you might use that for. (via MetaFilter)