Though I DO still use douche to mean bad thing, my reasoning being that douching is actually bad for you, so it works.
That is my EXACT same line of reasoning! I personally thing douche/douchebag is an especially appropriate insult FOR misogynists because it's an irritant that is bad for your vagina and exists to make women feel bad about their vaginas, it's PERFECT for fuckers who are the same way!

And please do pester me! Some girls will leave the pee trail too, but it is more a dominant male thing. The welts were more likely from scratches from ratty nails though; like cats, they have some bacteria under there despite being very clean animals.