You can't expect people to always like certain movies.
Waldo finds out his new girlfriend Heather has never seen his favorite movie, and they start watching, though Heather doesn't seem to like it so far.
Waldo wants to hang out with Heather.
Waldo turns off the movie and suggests doing something they both like.
Waldo insists Heather finish watching the movie with him, and that she'll come around on it.
Heather and Waldo have a lot of fun doing something they both like to do.
Heather resents having to waste two hours watching a movie she hates, and eventually breaks up with Waldo.