I've started learning to fly a glider last year, and I'll probably get my license next year. I always wear a diaper while flying, but I wear them 24/7, however peeing in a glider is a major issue.
Most old school pilots use a freezer bag, which they dispose in flight, not the most pleasant thought. Others like using pocket urinals, which actually have superabsorbers
in a kind of bottle that you pee in. While diapers are talked about as an option, most males prefer the other options. Female glider pilots who want to fly long distance
don't really have an option though.
While in powered flight you can always land on the next airport to pee, in a glider you don't just have a throttle that you can push and climb, you have to find thermals,
and once you're a few thousand feet above the ground you really don't want to give up that precious altitude unless you have to. Also if you're flying in a competition,
or want to submit the flight to OnlineContest, you have to stay in the air for it to count.
6 hours flight, with 500km distance or more isn't something you do everyday, but it's a quite common achievement where I live, and some pilots even mange to get similar
distances in planes from the 50s. It's an amazing feeling, flying without an engine buzzing all the time, just hearing the wind flow around your plane, finding a thermal, and
without expending any energy at all, circling higher and higher, until you're right underneath the clouds.
I recently confused a few pilots talking about different engines and fuels, by telling them I fly a fusion powered plane, and when they ask where I got a fusion reactor from, I
just pointed at the sun and told them that I fly a glider. But then again, you could argue that all fuels we have are just made from fusion power and time, often a lot of time, with maybe a few hard to find exceptions.