Admittedly I wore underwear on the plane when coming to Ireland, but soon after I got to Ireland I bought pull-ups and threw away the pair of underwear that I was wearing.
I now only have pull-ups for the rest of the vacation, and I'm planning to wear them instead of regular underwear for the rest of my life. When I get back to the US I'm going to throw away all of my regular underwear.
To be clear, I won't be using them all the time. I'll decide on a case by case basis whether to use my diaper or use a toilet.
I'll be wearing diapers on the flight back to the US.
I know I keep saying diaper instead of pull-up, but it's just so much easier to use the word "diaper" for any type of absorbent underwear.
I also tend to sleep naked so I won't be wearing a diaper to bed, though I could change my mind about that in the future.
This is a solo trip, and I'm hoping to meet an Irish ABDL.