First of all, I find it a massive turn on to find a spot, where one or several women left a mess. Although I don't like littering, I also appreciate finding dropped tissues from wiping, because it adds to the admirable 'I don't give a shit' attitude when it comes to peeing outdoors.
Considering my own behaviour, I also love to leave puddles in places, where others will most likely find them. E.g., when taking road trips, I always make sure to be very well hydrated to have several piss stops. I prefer laybys with no toilet facilities or quiet side roads and love to release a full bladder i