Marilyn Monroe was, like Tony Curtis, new to Hollywood and wanting to be a star so he offered her a lift in his cheap Buick convertible and drove her to the hotel where she was staying. She gave him her number but it was a week before he had the courage to ask her out.
Definition of idea 1 a: a transcendent entity that is a real pattern of which existing things are imperfect representations b: a standard of perfection : ideal
A concept is a thought or idea. It's a general idea about a thing or group of things, derived from specific instances or occurrences. It often applies to a theoretical idea in science: Einstein's contribution to the concept of relativity. A concept is an idea conceived in the mind.