I have three products: The first one is a main product which has the second one as up-selling product. They pretty much fit together because they are related somehow (for example a MP3-Player and some headphones).
Now there is a third product, which I also would like to add as a up-selling product, for example a special waterproofed bag which isn't really related to the other two products. Though, you could use that product for the MP3-Player to keep it dry during sports. I would like to add that as a description especially for this relation. Like a "reason" why that product is related to the other one.
Is there any kind of extension or even a way to do that with Magento in general?