People with upturned corners of the mouth are cheerful, optimistic, sociable and infectious. People with upturned corners of the mouth tend to be conceited, pushy and like to show themselves. People with upward corners of the mouth are cheerful and optimistic, sociable and infectious. People with upturned corners of the mouth tend to be conceited, pushy and like to show themselves. People with upward corners of the mouth are cheerful and optimistic, sociable and infectious.