Little Johnny's at it again......

[rebbonk]

A new teacher was trying to make use of her psychology courses. She started her class by saying, 'Everyone who thinks they're stupid, stand up!'

After a few seconds, Little Johnny stood up.

The teacher said, 'Do you think you're stupid, Little Johnny?'

Spoiler:

'No, ma'am, but I hate to see you standing there all by yourself!'