Meaning of Life is the imperfect Python movie, a curate's egg of semi-related sketches that allow the theme to run through to the end but make it, in the end, the film that is always relegated behind Holy Grail/Life of Brian (which one is best? fight it out between yourselves). But it still has some true Python gem moments, capped off by this scene.
It has everything, from real shock value (this film was first shown in 1983, rare are the scenes that can truly shock nearly 30 years later) to full on funny and the wonderfully silly wwwafeeeh theeeen meeeeent at the end. Led in, as it must be, by The Penis Song.