If you've ever told someone your favourite comedy film, only for them to crushingly blankface you and tell you that it is in fact, not funny and barely constitutes a film, let alone something to laugh at, then you'll be all to familiar with the ensuing doubt.
There's something more excruciating, more exposing about comedy in particular, for enjoying categorically unfunny things is the most socially damning indictment of you as an individual. And doing it unknowingly, well, that's enough to cause a full blown existential crisis. If you can no longer know for sure if something's funny, then what do you know?
Ricky Gervais is funny. He redefined the sitcom. He's won several awards for services to humour. He wrote a scene with Les Dennis, Keith Chegwin and Barry from Eastenders discussing suicide that still manages to raise a smile. He doesn't need validation from your doubting pals, and you won't either if you watch the films that make him roar and adopt them as your own bulletproof comedy favourites.