Maine Coon's are known to be "water" cats. Mishi is fascinated with water too, although he's too big and clumsy to get up into the sinks or the bathtub by himself. He will usually meow plaintively and look up at me with his HUGE green eyes to please let him play in the bathtub. I always oblige my silly big boy and put him in there. When he's done he will meow again to let me know he's done playing and wants me to rescue him.

As for closed doors, the only place my cats are not allowed is in the closets. Other than that, all doors are left open, ESPECIALLY the bathroom door. It is their favorite place to come and visit as they know they have a "captive" audience who will give them lots of attention.