Okafor's Law states that once a man has had a woman, he can have her again at any time, and a believer in the law puts it to a test with past girlfriends over a 21-day period.
Silver Linings Playbook
(500) Days of Summer
Love Actually
Crazy, Stupid, Love.
Modern Times
10 Things I Hate About You
The Graduate
As Good as It Gets
City Lights
The Apartment