I just went naked around the house after warning my son. I told him that for a week I was going to be that fat naked old guy surfing the Internet that we have all seen the pix of. The catheter hurt and I hated it, but I had a lot of pain elsewhere too. When necessary I wore a pair of loose shorts or sweatpants. One of the hardest things for me was not doing much for a week until the catheter was out. I lived on the couch and in this office chair (home office).
My 87 year old father-in-law carried his catheter bag around his house instead of using the supplied straps to tie it to his leg. He did that until he fell and broke his hip. Now the nursing care staff keeps it strapped to his leg.
Prepare to be the fountain when you get it out.