Nice!! I've got one instance in the airline toilet as well.. But I'm not happy with that number, gotta bring it up a bit. After all, I'm a pilot.. it should be my specific duty to induct women into the mile high club!
yes it definitely is possible, found that out a few weeks back hehe.. prolly helps that my GF is like 5"1' ...
Also say if you had a something in the boot, like maybe a pc, and you threw some pillows on it and a blanket.. then that would bring it to the same height as the boot sill .. which would also happen be about waist height, well my waist height when im standing. . . . . not for overly public spaces tho !!
In the Z no way. I am 6'5" so IT in almost any vehicle is almost impossible, unless you have a 5'0" gymnast that can bend in every direction. I have found out that it is possible to do IT on the trunk (boot for those down under). Like nang3 said IT should be done in a semi-private place, depends on how big of an exibitionist you are to determine what "semi-private" means. PSU 350 and I have "entertained" ourselves on a couple of back country roads this way.