are they... missing limbs or am i crazy?
You have to use your imagination and squint a bit. The "Gimpee" has his/her hands touching their shoulders and they're in a kneeling position, knees spread with the calves against the thighs. Doesn't look like fun to me . . .
A friend's wife had a locking realistic Border Collie fursuit commissioned. Body, feet, paws, tail and head all one piece. The paws were heavily padded so no using hands while in suit. The back zipper went from the base of the tail up to the back of the head where the pull could be key-locked. When they went into the fursuit headless lounges at conventions, he would just unzip the back far enough for her to take the head off, allowing it to lay on her assets while cooling off.
There was one more unusually placed zipper so other needs could be attended to without suit removal . . .
She had wanted me to do the commission but I was working too many hours at the time and I had safety issues with not being able to take off the head and paws by herself. Somebody in NorCal did the suit, I don't remember who it was, though. Not important.
I dunno, not my cup of tea.