This blogpost will be continually updated with screenshots, film posters and back of DVDs that contain a fairly uncommon occurrence: things rated 15 for merely 'moderate' things.
The witty teen movie that exhibits the comedic talents of 2017 Oscar-winner Emma Stone:
And because I'm currently re-watching all of Desperate Housewives (and have managed to rope my brother into joining in!):-
This episode of Desperate Housewives was the sole contributor to its 15 certificate for all of season 2!
Another American TV show that is rated TV-14 in the States and only has moderate components here (according to the back of the DVD), is Boston Legal:
And Guess Who, an unsuccessful remake of Guess Who's Coming to Dinner, was awarded a 15 for not just moderate reasons, but mild ones too...
And finally, Fellini's much-raved about Amarcord (which I personally was bored to tears by), contains 'moderate sex and sexual references', although I would contest the 'moderate'-ness of a group of teenage boys sitting in a car masturbating together...
For more BBFC geekery, check out my entire compendium!