I saw a post about straight microphilia (which should have been called macrophilia really), and thought to post that there is also gay macrophilia, in which some men fantasize about being giants and some men fantasize about being tiny, and they are attracted to each other.
Some of these men can be straight too, or bisexual, but like macrophilia (attraction to giants) or microphilia (attraction to littles).
So there is diversity in this fetish. There are very few trans as well.