It's rude to wake people up when they are sleeping.
Jen arrives home to her shared apartment feeling elated and in the mood to dance.
Jen wants to blast her favorite song.
Jen plugs in her headphones, puts the song on and turns the volume up.
Jen puts her song on the stereo and cranks it up.
Jen enjoys her favorite song at high volume without disturbing anyone.
Jen feels guilty when she realizes her roommate woke up because of the music.