Once upon a time, there was a teacher named Ms. Smith. She was kind and funny, and all the students loved her. But she had a peculiar secret - every time she had a drink of water, her butt would grow bigger!

At first, Ms. Smith didn't know what was happening. One day, during recess, she went to the water fountain and took a sip. Suddenly, her pants started feeling tighter and tighter. Before she knew it, her butt had grown twice its size!

The students couldn't believe their eyes. They tried to hide their giggles, but it was hard not to notice. Ms. Smith, being the wonderful teacher she was, simply laughed it off. She had a big heart and an even bigger sense of humor.

As the days went by, Ms. Smith learned to embrace her unique quirk. She started wearing special pants that could stretch along with her growing butt. It became a funny routine in the classroom - whenever Ms. Smith took a sip of water, the students eagerly waited to see her butt expand!

Eventually, Ms. Smith's expanding butt became a symbol of her love for learning and teaching. The students appreciated her for who she was, quirks and all. And whenever they drank water, they couldn't help but smile and think of their funny, expanding teacher.