That is sad. It is hard to convince someone to exercise if they do not want to; they will always find an excuse. With a friend of mine, I went as far as giving him a bicycle. It has not been used.

In the other forum you mentioned he wants a three wheeler like one you have. How about picking him up and taking him out for a ride? He could try yours and you can ride another one of your bikes. Maybe he will really like it...