

I recall seeing videos of cats that are quite sneaky, performing ninja-gymnastics to operate doors. They wait until no humans are around and go and do something the owner doesn’t like. In some cases owners took care to ensure a cat could not access whatever area was banned only to discover after installing surveillance videos that the cat can pull off some amazing feats when no one is around – and close the door to conceal their mischief.
















Sounds like marking, which I think only happens if the cat is in competition with another animal for territory.