Not everyone quite gets the idea of metaphor and analogy. Here are some examples taken from high school essays (and provided by www.mikeysfunnies.com):
~ Her face was a perfect oval, like a circle that had its two sides gently compressed by a Thigh Master.
~ His thoughts tumbled in his head, making and breaking alliances like socks in a dryer without Cling Free.
~ He spoke with the wisdom that can only come from experience, like a guy who went blind because he looked at a solar eclipse without one of those boxes with a pinhole in it and now goes around the country speaking at high schools about the dangers of looking at a solar eclipse without one of those boxes with a pinhole in it.
~ She grew on him like she was a colony of E. coli and he was room-temperature Canadian beef.
~ She had a deep, throaty, genuine laugh, like that sound a dog makes just before it throws up.
~ Her vocabulary was as bad as, like, whatever.
~ He was as tall as a six-foot-three-inch tree.
~ The little boat gently drifted across the pond exactly the way a bowling ball wouldn't.
~ From the attic came an unearthly howl. The whole scene had an eerie, surreal quality, like when you're on vacation in another city and Jeopardy comes on at 7:00 p.m. instead of 7:30.
~ Her hair glistened in the rain like a nose hair after a sneeze.