It's really the patronizing tone. (I've never heard that first line to the song, but now I can't think of what the first line I'm familiar with is.) Don isn't my "wheel-footed friend", he's a wheelchair user. And also (she types, as though you-Sasha don't know), it's not like disabilities are limited to people who use wheelchairs or scooters.

*sigh* I've talked with someone who was at WorldCon and she just seemed so exhausted by the whole thing.