physical necessity

It's unfortunate that some people confuse physical necessity with impropriety.

"There was certainly no compelling medical or physical necessity to go public with my medical condition."

In each case the wings evolved separately, so their form reflects certain physical necessities.

There is no physical necessity in your world, and consequently no time.

There was no physical necessity for him to avoid personal flight.

Was there no end to these revolting physical necessities?

They go days without a bath, and have to use the side of the road for their physical necessities.

They involved physical necessities like food and clothing.

For where the positive values are suppressed, Evil will take over with the force and inevitability of a physical necessity.

Now he understood the physical necessity of such strange, loose clothing.