Really the only time you would want to climb into a pit latrine.
We are all very impressed and rather fascinated by the depth of the hole dug for the teachers pit latrines. It had to be 40 feet deep and they accomplish this using shovel, pick axe, a jerry can on a rope and shear manpower. While one man climbs down into the hole and digs into a bucket, the other pulls it up and empties it. It will take one entire week of this process to get all the way down to 40 ft.