More oily skin is more of a male change than a female one. Female equals dry skin. It can come from a variety of things, but psychological, not sure.
As for the general case, I'm not sure what to believe, but I'm not closed to the idea either. There are some things in my life that could have been caused by my way of thinking. Maybe. But might as well just be coincidences and entirely explainable by something else.
- I've always wanted to be blond. Not sure why. As a child, like most people in my father's family, I was shiny blond. But unlike theirs, my hair did not get very brown. In my father's family, they're all dark-brown-and-almost-black, except one of my uncles, who's a lighter brown, but still very brown. If anything, his brown is closer to red than it is to blond. Very opaque. Yet my hair, even though it did darken with time, can still be considered blond. Depending on the lighting, it can look blond, dirty blond or light brown. And of course, on my mother's side, it's brown all the way.
- As a child (and well, afterwards too), I was attracted by that physical characteristic, mainly in younger, thinner guys, when the chest, in the center, is "embossed" forward, making the chest a little pointy, and the most forward point the center, not the pectorals. I found it very, very sexy. I wanted it for myself. (Autoandrophilia, lol.) Then just a few years later, when the trans stuff became clearer in my head, I bitterly regretted that wish as it had developed on me, and I wasn't so happy about it now.
- I've always wanted to have larger, feminine hips. Even in periods when I didn't care so much about wanting to be a girl. Well, during the later parts of my puberty, my hips grew. Nothing amazing, and nothing actually female, but I was really happy with those wider, perhaps abnormal for a guy, hips. And upon starting HRT on a tiny dose of E, whilst it normally doesn't happen to people, my hips grew a little, while losing weight (so no fat redistribution).
- I've always wanted to be thin. Well, while I was pretty heavy-built in my childhood, gradually, it got better. Now, when compared to the rest of the family, especially for a guy who've spent years under the influence of testosterone, in certain aspects, I actually look delicate-ish. I'm still more heavily built for my height than the average, eh. But it could have been worse, much worse.
Am I imagining the causality? Most probably. Is it possible that I'm not imagining it? Yes. Will we ever know? Maybe, but sounds far away.