Sinks are a favorite spot to hang out for many cats. One reason may be that the cold, hard porcelain or ceramic basin of a sink cools them off after they’ve been sunning in a window or resting near a radiator. They may also enjoy their bodies being “cradled” by the sink’s roundedness; having most of their body touched is reminiscent of what a kitten experiences when her body is surrounded and touched by her huddling littermates. Then, too, cats like being up high, and sinks are always off the ground.