What is it with the sink??? One of my followers' cat does this as well. I guess they like it because they are curled up so cozy. When my cats do this I really have to fight the urge to turn the water on. Actually I have turned it on this one before, and his fur is so thick, it usually takes a while for it to sink in. We make fun of this poor fat cat, but we love him, he is so sweet & lovable.