Several of my cats through the years have loved to sleep in the sink -- it seems to be a phase they go through and then they quit.

This is Muffin, aka the Muffinator, so named by my husband because she was such a prolific hunter when she was an indoor/outdoor cat. All our cats are indoor cats now.

Muffin lived across the street, had a perfectly nice home, but decided to move into ours because she and Rusy were playmates. She came through the cat door (now closed) and stayed. Her former owner finally asked if we wanted to adopt her. She plays only with Rusty and is the senior female curmudgeon but is getting a bit friendlier with me as she ages. She really likes my husband best but will curl up to either computer given the chance.