I totally understand about his worry, since I’ve had urostomy 41/2 years. It will happen; have plans that he’s thought through. Watch for early signs of pending leakage ( bubble around tape), always carry total new urostomy equipment in small bag, have a bath towel in car in case happens while driving, I like dark pants because people don’t notice leak until you can remove yourself. When go to empty bag ALWAYS check wafer for any problems.Monitor fluid intake if not going to be around restroom, keep it low. Just tell people you need to excuse yourself.Keep hand over wafer when putting on for a minimum of 10 minutes ((don’t fudge). Be strategic about wherhever you are going. I promise nobody has noticed me springing a leak all these years.