Now that is a messy proposition! HAHA!
Name of some of the deceased:
http://www.nytimes.com/interactive/2015/03/24/world/europe/100000003593719.mobile.html
Messy if the pilots use the transfer door/box to pass soiled diapers out of the cockpit. Seriously, there was a female astronaut who wore diapers on a long drive in a car to commit a murder; no need for pit stops that would delay her. So people do use adult diapers to avoid restroom trips.