You shouldn't hurt your friend's feelings.
David invites his friend Sheila to dinner and shows her his artwork.
Sheila wants to critique David's artwork.
Sheila points out some parts of David's artwork that she thinks could use improvement and also points out the good points in his art.
Sheila tells David that his artwork is blase and mediocre and that he shouldn't quit his day job.
David is happy to hear Sheila's critique about his artwork and feels comfortable sharing more of his art with her.
David is hurt by Sheila's words and stops talking to her.