What does it mean to "water the flowers" in gay sex?

What is water the flowers?

One of many terms, to describe a male who will urinate in public, that can include others noticing, or in doing it in private, such as behind bushes, or a tree.

Definition

Many phrases are used, to describe someone who will take a piss outdoors, in public.

Water the Dragon is one of them, and there are phrases which are gender specific as well.