A doctor woke up in the middle of the night needing the bathroom, only to discover that his toilet was completely blocked.

Annoyed, he went back to the bedroom and said to his wife, “I’ll have to call a plumber.”

His wife sat up, shocked. “At three in the morning? You can’t call a plumber at this hour!”

The doctor shrugged. “Why not? If one of my patients has an emergency in the middle of the night, I have to go out and see them.”

So he called a plumber.

The plumber answered the phone sounding half-asleep and very unhappy.

“A blocked toilet? At three in the morning?” he grumbled.

The doctor said, “Listen, I’m a doctor. I get called out at all hours when people need help. Why should your job be any different?”

Reluctantly, the plumber agreed.

Around three-thirty, he arrived at the house, bleary-eyed and clearly irritated. The doctor led him straight to the bathroom and pointed at the blocked toilet.

The plumber looked at it for a few seconds, reached into his bag, pulled out two tablets, and dropped them into the bowl.

Then he turned to the doctor and said:

“If there’s no change, call me in the morning.”