When he was a child, he received a spanking from his mother when he did something bad.

He inserted his finger into the anus.

He trains his gluteus maximus at the gym every day.

He started exercises to strengthen his gluteus medius muscle.

He exercises every day to strengthen his gluteus minimus muscle.

He likes to take a walk in the park at dusk.

Seeing his failure, we laughed like a monkey's butt.

He slipped and hit his backside.

We should always remember the power of Kannon in difficult times.

He is acting in a way that is like 'hide the head but forget the tail'.