Reasons

1) I have insomnia. Not the "I fall asleep late" insomnia that all people claim they have, I have actual diagnosed insomnia.

2) I feel if I fall asleep, I'll miss something historical or epic in life.

3) My mind keeps thinking of other stories to write.

4) I work alternating shifts, so if my phone rings, I have to be able to hear it and respond.

5) If I drink too much coffee then, ya know.

6) If I finally fall asleep, I'm afraid to oversleep.

7) I don't know...I just don't sometimes.