That's right. The ugly "You Should Know" monster that keeps us silent toward getting our needs met while being secretly frustrated at the person who we've entrusted to figure out what said needs are through mental telepathy. Yes, it may sound silly, but it is unfortunately how many of us are navigating our relationships OR using as a measuring tool to end them. Whether it's a "You should know what I like..." "You should know what I want..." "You should know that I don't..." or "You should know that I won't...", there will never be any clearer communication than just saying whatever it is that needs to be said following that opening statement.
It's also pretty safe to assume romance movies have done many of us in as well, where the friend happens to send flowers at just the right time or the guy proposes at just the right moment or someone says "I love you" seconds before a shooting star passes by. And so we hold on to these images and apply them to our own situations, forgetting the fact that a team of writers and producers were responsible for those moments we're measuring our own relationships against.