There's Something About Mary

Many, many years ago, Ned Beatty's career was almost crippled by his willingness to "squeal like a pig" in John Boorman's Deliverance. In 1998, Cameron Diaz rubbed semen into her scalp and became a star. Go, as they used to say, figure.

As a teenager, Ted (Ben Stiller) snagged his manhood in a zip while wooing the super-popular and lovely Mary (Diaz, at the top of her game). Thirteen years later, he can't get her out of his mind. So he hires sleazy private detective Healy (Matt Dillon) to track her down. Healy ends up falling for Mary himself and so tries to put Ted off.

Gross-out shenanigans ensue, most notoriously in a scene where Mary mistakes semen for hair gel. Like the rest of the film, the scene is puerile, politically incorrect, rib-achingly funny and strangely insightful.