This is an evening/ night-time activity, not something that should happen in the middle of the day while the kids are at school.
2. Because it makes my hair all mussed up and it takes too long to get dressed when someone comes to the door.
Unless you leave your clothes on, in which case they look all rumpled, and the people at the door will still wonder what you've been doing.
3. Because sometimes the headache really is worse when you're done.
4. Because there's never enough time to do it properly.
5. The time thing always leaves me feeling really grumpy, disoriented and vaguely unsatisfied.
(Top 5 reasons why I don't like to take naps.)