Taking a nap in the late afternoon can be a very appealing prospect.
Unfortunately, a late-in-the-day nap can easily mess up a person’s sleep schedule, causing them to stay up until 3 AM.
What is needed for most people is some sort of “nap deterrent” that will promote a daylight-hour-compatible sleep schedule. (Individuals who work a night shift can replace “nocturnal” with ”diurnal” in the idea below.)
To promote a nighttime sleep schedule, we obtain a vicious nocturnal animal and train it to sleep on the user’s bed during the day (Figure 1).
The exact method of training this adversarial animal companion is left as an exercise to the reader.
Once the sun sets (and the animal wakes up), the bed will again become appealing for sleeping in.
Ideally, this animal would be cold-blooded, so as to reduce its feeding requirements and make the whole setup more eco-friendly.
PROS: Helps maintain a schedule that is compatible with standard business hours and the waking hours of most other human beings.
CONS: The same thing might be accomplished by just getting a really angry cat, so it’s hard to see how anyone could make money off this idea.