Show, Don't Tell is a main rule of all fiction, visual or not, and applies even more so in emotionally-charged moments of triumph and heartwarming that are seen as having a duty to be as vivid and narratively satisfying as possible to make the audience cheer with glee. Since the Relationship Upgrade in successful romance almost always qualifies for this, there's a strong tendency for characters to act out the moment of upgrade with a big, uncomplicated smooch. A major staple of TV shows. SPOILERS AHOY! Examples of Official Kiss include: