Floss conundrum

So now that I'm going to be a good girl and floss my teeth every night, I face a serious question: order of operations. I've always brushed first, then used mouthwash, which seems a highly logical order to me, but I can make equally good arguments for flossing either before or after brushing (I'm pretty convinced the mouthwash ought to be last).

[Poll #1215778]

Present your evidence! (Or your strong personal opinions, or wild guesses. Those work too.)

This post is mostly for Sev and Nay

Is this a comment on Will Smith's ego, his acting ability, or ....something else?

Also note some unintentional hilarity caused by British slang in the text.