Now That's What I Call Literature

For the first month of Ricardo and Felicity's affair, they greeted one another at every stolen rendezvous with a kiss--a lengthy, ravenous kiss, Ricardo lapping and sucking at Felicity's mouth as if she were a giant cage-mounted water bottle and he were the world's thirstiest gerbil.

This and other classics from the 2010 Bulwer-Lytton contest can be found here. Another favorite:

The dark, drafty old house was lopsided and decrepit, leaning in on itself, the way an aging possum carrying a very heavy, overcooked drumstick in his mouth might list to one side if he were also favoring a torn Achilles tendon, assuming possums have them.