I have a friend who has given up gluten for lent. We had an interesting discussion today about whether this would be annoying to someone suffering from celiac disease. We considered this test case: would it be OK, or not OK, to rent a wheelchair and give up walking for Lent? Clearly not OK, it seems to me, but I’m having trouble formulating the correct decision principle. Lots of people give up sweets for Lent, and this doesn’t seem insensitive in any way to the world’s diabetics.