The old couple were becoming weekly regulars taking a trip with the wheelchair van from their nursing home to the medical building and back that afternoon. One day, noting that the husband didn't actually use a wheelchair at the home, the attendant had to ask them what was wrong.
"Oh, nothing. Chester and I are gong to the sex therapist".
"Sex therapist? At your age?".
(Blushing)"Well, yes. The home won't let us share a room, we can't afford a taxi to a motel room, but Medicare covers this from door to door. Let's not be late for the appointment, please?".