You're expected to keep your bed neat.
Marvin has been dating Glenda for a few weeks, and she is coming to visit his apartment for the first time.
Marvin wants to tidy up his apartment a little.
Marvin cleans the apartment thoroughly and makes his bed up nice and neat.
Marvin cleans up the living room, but he doesn't make up his bed or tidy up his bedroom.
Glenda is impressed by how neat Marvin's bed is, and she ends up spending the night.
Glenda sees how messy Marvin's bed is, and she feels turned off.