Judging from all those "could I be prangnent" questions her in Answerbag, I'd say it's about effin' d*mn a whole bunch of girls learn how to read and FOLLOW the d*mn instructions to the letter on how to properly take them in the first place.
Of course...that's assuming they even intended to take them in the first place...
In my humble opinion, of course.
(And before I get a whole load of people complaining that they WERE taking them correctly: I'm NOT talking about YOU. So please don't go there!)