Tut tut, some more sensitivity is needed hereabouts. I know a number of couples who, between the husband and wife, share a FOLDING WHEELCHAIR. Not all who use a wheelchair are various-plegics-- as we all age, we may be at any point of mobility impairment on a very wide spectrum.

And some users of assistive equipment are strong enough to lift it over our heads in case a fight for space breaks out. (Walkers folded, for example, need space too.). On a plane, the flight attendant adjudicates these battles. On a bus doesn't it fall to the driver?

~S~