Great ...Jetto's humour is based on toilet humour .
You know, every comment you've made on these comics expresses dissatisfaction. Maybe you should stop reading them, if you dislike them and the artist so much.
If you've ever watered a lawn, you probably know it takes a bunch of water to make a rainbow that can be seen at a distance; Tenshi must be holding a lot of liquid!
On a number of military aircraft I have been on, the only built-in provision for going to the bathroom was a "relief tube". The T-34, E-2, an C-130 are the ones I've seen equipped with this. It's basically a flexible plastic tube with a funnel and a spring loaded clamp or valve on it. The pressure difference between the inside and outside of the plane can be used to basically suck the fluid out the tube. The T-34 was unpressurized, so there was a kind of fitting sort of like a venturi nozzle on the bottom of the plane that created a pressure differential. I don't think I ever saw a minimum altitude for using the relief tube, but at cruising altitude (when it would be safe to use the thing) the pee will generally evaporate before it hits the ground.
My apologies, Eldest Daughter! I'm truly sorry!!Ooh, a rainbow!It's so pretty!Get your ass out of there! Hurry the hell up and get out, Iku!! A gift from the heavens...!!