"Fairness" is something for us to strive for as a society, sadly not something inherent to the universe. It is unfair that you have to resist all the time. It's not anywhere near the top of the list of unfair things to happen to people but it's definitely unfair. And I guess what makes it hard - for me, at least - is that it's a choice you have to make every hour of every day. Back when my skin was at its worst people would regularly tell me they couldn't go out like that or couldn't deal with it, but of course that would if they had to. When you don't have a choice you just do what you can. We do have a choice: resist or get fat. It's not much of one, but the short-term benefits sometimes seem to outweigh the long-term punishment and that makes it hard. And unfair. We can still do it though, and one good thing of being all grown up is knowing that the crappy days pass.