Jenna: Marriage is like death. You settle into a routine, you lose all the spark.
Liz: I don't know, I always thought the whole point of being with someone for a long time is to get to the comfortable routine part.
Jenna: No. Relationship are like sharks, Liz. If you're not left with several bite marks after intercourse then something's wrong.
Liz: Well nothing's wrong with me and Carol. I mean, we haven't spoken in five days but that doesn't mean anything. Because we are not sharks. We're legless turtles rotting on the beach.
(30 Rock, Season 5, Episode 9)