You don't understand? Let me clarify:
I was comparing you to the "feminine hygiene device", as you put it, because? You are a douchebag. Meaning? You are the same as something that is used to clean fungus, bacteria, yeast, and anything else that is UNDESIRABLE in one's vagina, to be immediately thrown out after use.
Did I make that more clear? Troll elsewhere, it's seriously annoying.
Why do you keep using irregular line breaks? Sometimes it's one, sometimes two, sometimes four... it's spectacularly irritating, and makes your posts inconvenient to read.
And you're right, I'm not terribly au fait with the concept of douching. I don't, after all, have a vagina. That said, I understood it was more of a preventative measure?
On top of that, I'm still not sure how it's relevant as an insult... it's sort of like calling someone a toothbrush, or a loofah.