I can understand that a deaf dog would choose to be able to see you when your at home, makes sense. If I'm really quite Cookie always comes to check out what I'm doing.
Maybe they just don't want to miss anything Often Cookie does follow me into the bathroom, but usually gets bored, so if the house is empty I just leave the door open for him. If not I stand by the door and if he stays in I just put a towel down for him, if he goes out I praise him and have my shower. Sometimes he will try and join me in the walk in shower, and when I get out he dried my knees for me!