I can sympathize. My DH hates to wear pants. He wears shorts to work year 'round. When we were planning for our cruise, he decided he would eat in the room or the buffet, if necessary, but agreed to bring his ill-fitting, old dress clothes for Tritons, as a concession. After we left the house for our vacation, it occurred to me that he probably "forgot" his dress clothes. Fortunately, we were only 10 minutes down the road, so I made him go back and get them. Once on board, he was glad to have them, because, lo and behold, he wanted to eat in the restaurants and wanted to fit in.
I was thinking about this...do you not EVER go out to a decent dinner? What about church, the movies, parties at a friend's house? Is he a recluse and has no need for pants? In that case, maybe he should stay home.
Speaking for my family, I can say that we don't go out to dressy restaurants, have not been to a wedding in ten years, and go to a church where casual dress is the norm. Our friends are all very casual, as well. I don't find it so hard to believe someone doesn't own pants. It does sound like he's being pig-headed, but I don't think he should be condemned to house arrest!
Sometimes people like to be contrary just for the sake of being contrary. If he's dug in his heels and won't budge, just let it go. Bring a pair of khakis that you think will be close to fitting. As someone else mentioned, leave on the tags in case they don't get used.
Barb, I'm sending you a PM.