I had a cat called Whiskey from 6 weeks old until he passed at about 15 years old. He hated any door being closed. He would sit in front of a bedroom or bathroom door until you opened it. He didn't want to go in, he just wanted the door open.
We had a linen cupboard in the hallway at one house, two lower and two upper cabinet doors, and the bottom one would be open about every time I went by it. I thought it was the kids until one day I caught him at what he was doing. He was laying on his back on the floor, reaching both front legs up above his head, and pulling the door open with his paws.