Thanks everyone - awesome ideas. We went with drawstring pajama bottoms and Jeff is not amused, but they are taking his mind off his troubles. Left alone the abrasion, which is very superficial, is healing nicely.
Thank you again for the ideas - I was definitely not thinking very creatively, but this thread has shown there are so many options!
Sidebar: When I was shopping I saw boxers with PacMan type smiley faces. I was soooooooooooo tempted, but they were pricey!