Ever since we were kids, we’ve been told to brush our teeth twice a day and to floss every day. After all, our mouths can fill up with a lot of little, uninvited guests. But the brushing message seems to get a lot more attention, so it can be easy to forget to floss. And for some people, flossing can be a little comfortable and kind of time-consuming so it might be tempting to skip a day or two. After all, brushing is more important, right? You should definitely do both, but flossing is actually more important than brushing for keeping your mouth healthy. And as we go through these 13 terrible effects of skipping the floss, you’ll find out just how important it is.