Addictive is right. We find ourselves looking at tubs to use for racks. Then we snap out of it and convince ourselves "only 2...we are good with 2" It's like having a devil/angel on our shoulders.
*whispers in your ear : "get more.... get more... get more.... 2 is not enough... 2 is not enough....buy a rack,buy a rack.....MUAHAHHAHA"*