Sore back

[shubla]

When you log out without sleeping in a bed, you should get sore back wound when you log back in, decreasing agility etc.
It would heal relatively quickly, but would give players some more initiative to use beds.

[boshaw]

Sleeping on hard floors is better for you.

[Sevenless]

As someone who frequently forgets to sleep, the lack of healing and TW reduction is more than enough.

Sore back from lifting/hauling things? Yes, clearly, because life needs to be more hell.

[Aceb]

TW and wounds are the biggest reason to use beds. We don't need artificial shit'ere.