While I've never set out to be naughty "both ways", sooner or later s**t happens!
So, I have to admit there's been a few times where more than my bladder was caught short when I was enjoying the great outdoors. The most recent time was this past week when I'd driven out to farm country for a day long hike. I made sure I stayed well-hydrated and I'd already peed a couple times along the trail, but as I was heading back toward my car at dusk, I was still uncomfortably full.
No problem, I was going to pee again before starting the two hour drive. But, as I was standing there, enjoying s