I guess transmen know all about this, but I didn't know. There are tools that allow women to urinate standing up without depantsing and without making a mess. They are useful if, well, you want to use a urinal, or a filthy toilet without getting close to it. Or in situations where you're not comfortable or safe taking down your pants and squatting. Or if you physically can't take down your pants and squat.
People mention liking them for car trips and outdoorsy times. I can think of quite a few situations it could prove useful. And I can now officially attest to the easy use of the P Style, which is available at my local feminist bookstore, and maybe yours too. (There's also the WhizBiz from Australia, which looks like a long funnel, if you're more into that.)
If I post a picture of "abovegroundpool" written in the snow, you'll know what happened.