Summary: The Doctor is concerned about Jack giving people the wrong idea. Jack disagrees.
“If you can’t behave appropriately, you’ll have to wait for us in the TARDIS,” the Doctor said, frowning at Jack.
“Hey, it’s not my fault the people here are so friendly! Maybe you’re the one who needs to behave more appropriately; did you ever think of that? Snixxit is a pleasure planet, after all. I fit right in here while you…”
“You stick out like a sore thumb,” Rose finished for Jack.
“Smile, flirt a bit, let your hair down. Metaphorically speaking. Yours is a bit short.”