If you ever want to see the color rush from a man's face, just ask him to go into the store to buy tampons. Or Maxi pads. Because really, most guys have no clue how that stuff works, let alone which ones to buy.
With that in mind, Facts., an Irish comedy channel on YouTube, made a video asking a bunch of guys to explain the, uh, logistics of various women's sanitary products. They did not succeed.
It turns out that when confronted by tampons and models of the female anatomy, the guys had a couple of questions. For example, "What dictates a flow?" and "What am I looking at here?" and "Where am I supposed to put this?" ... among other profound inquiries. In other words, you can watch men squirm and hilariously wonder aloud about the things like, "... and you'll have a string hanging out of you like a party popper." Enough said.