This is from "Pheromone, My Lovely."

Clark is talking about playing hooky from work. Lois mentions that she had fun in high school. She was a member of the chess club and math club. In the pose she's in in this picture, she is saying,

"What are you saying, Clark? That I'm not a fun person? That I don't know how to have fun?"

This happens just before they get sprayed by Miranda.

-- Roger

"The Constitution only gives people the right to pursue happiness. You have to catch it yourself." -- Benjamin Franklin