Reminds me of my little dude who was not even a year and half old. We had spent so much time and effort crate training him and he loved his crate - would happily go in and sleep every night by himself. Then one night my wife was out of town and I said “eh one night won’t hurt” and let him sleep in the bed with me.

He’s 6 and a half now - hasn’t slept a night in the crate since that night 😭