I think it's great that your husband does this! I am a healthy woman and I frequently give up my seat to elderly, women, or men with young children since my children are a little older now. On our last two trips I got quite irritated at the number of parents with young children who had to stand on the bus. After all, I can only give up one seat! On our summer trip my husband and I both injured our selves, (his foot, my knee) and at that time I couldn't give up my seat and felt very guilty! So try not to judge everyone who may not give up their seat. However, I do think that on a full bus there are always healthy people who can give up their seats and don't. Some may argue that it's their vacation too, but I have a hard time sitting while watching an elderly person or someone standing with a baby.