Because they're men. I've been catching up on 20th century movies, and this basically sums them up very well. He does, eventually. He gets bored, decides something else is more worthy of his attention.
[ooc: In case you're on your phone! The link is to a GIF set from Mary Poppins with Mrs Banks' quote of "While we adore men individually, we agree that as a group they're rather stupid"!]