Forrest Gump

It could be argued that with his IQ of 75 Forrest does not quite understand everything that happens to him. Not so. He understands everything that he needs to know, and the rest, the movie suggests, is just surplus. He even understands everything that's important about love, although Jenny, the girl he falls in love with in grade school and never falls out of love with, tells him, "Forrest, you don't know what love is."