P-Tree Gives you Permission to Pee

The P-Tree by Dutch designers Aandeboom is fascinating.  Drunken revelers can now pee on trees without worry - although having permission might take all the fun out of it.  The P-Tree is simple:  strap the rota-molded urinal to a tree, tie it into septic or drainage, and viola!  Instant potty.  The only question I have left for Aandeboom is, what about the ladies?