His mom

Arnold gasped as his mom entered the bathroom and saw him with his hand on his penis. “Arnold Sebastian Stuart!” Stephanie yelled. “Get your hand away from your penis!”

Stephanie grabbed Arnold and lifted him out of the tub, bending him over the tub. She had his bare butt facing the doorway, legs spread.

Her hand smacked his bare butt fast and hard and with high frequency. Arnold yelped and gasped. “Wait! Stop! Please! Don’t!”

The door was wide open. Anyone could walk in and see him being spanked naked by his mom. “How dare you touch yourself like that in my house! I can’t trust you to bathe yourself! From now on you will not be able to have doors closed. They are to remain open. At all times,” Stephanie said. “Do you understand?”

“Yes!” Arnold squealed.

He was embarrassed to be shamed by his mom.

“Now to deal with your little problem,” Stephanie said.