I was helping fellow art bazaar member next booth (life sketching) when a lady approached the booth inspecting a sketch on the table.
Me: Hi ma'am. Do you like to have a portrait of yourself? My friend here charge very cheap.
The lady did not answer me quickly. She instead rolled her eyes and hold her glasses. After 2 minutes, she answered, "no, I am an artist. " And left.
Maybe I was rude to ask but how was I suppose to know that she is an artist that do self-portrait?!