How do I introduce wearing Depends to my father?

Yes, I agree with vw. Simply replace his underwear with the pull-ons. Trust me, he'll feel better. My mom some time before she finally wore them, but once she did she exclaimed how wonderful it was because she could relieve herself easily.

I suggest you buy the men's Depends and place them in the drawer where he keeps his underpants now. Depends makes them more attractive now, and some pull on and off just like underwear. Just nicely tell him they're they "new" kind or style of underpants. That they're easier to use and also help with odor or any "problems". And don't buy him any more "normal" underpants. If he doesn't have any normal underpants, he will gently be forced to wear Depends. I did this with my mother-in-law, and she had no problem converting. Good luck!!