Skinny doesn't alway equal no face fat. Everyone is built differently. I'm 25 and deemed skinny by those around me and I still have "face fat" as you'd call it. And seriously stop telling skinny people to gain weight or saying that they'd look better if they did its rude and annoying. Even if they aren't at a healthy weight just don't say anything. There could be health problems you don't know about that make it difficult for them to do so. Example both my mom and I have over active thyroids so it is so incredibly difficult for us to gain weight. Even with medication and meetings with dietitians it's the hardest thing ever. And thyroid issues mess with other organs as well and can be quite dnsgerous. And the most annoying thing to hear, especially for my mom, is "well you'd look better if you'd gain weight". Not trying to be rude to you here, just trying to bring light to the fact that that is a rude thing to say to anyone. Comments about weight at all, losing or gaining are rude and shouldn't be discussed.