My cat used to hide in the space between the dishwasher and the wall until he got too big to fit.
It was a sad day for him. Poor fatty.
Just wait. If he's anything like my cats, he'll eventually get
stuck in the space between the dishwasher and the wall.
The two brothers we got when they were little used to squeeze between the cushions and play
inside of a sectional couch we have. I can't tell you how many times I've had to extract them when they are pissing and moaning because they can't get back out again.