Neither; just sounds like heterosexuality with extra steps to me.

Cuz a man who's turned on by imagining himself as a woman is simply... female-attracted. Sure, he's attracted to himself, but that "self" is, in his mind, A WOMAN. The fact that he's really a dude isn't part of the fantasy. Like, if a guy is turned on by a first-person prose account of a hot woman doing sexy stuff, does that mean HE'S bisexual? How? The erotic focus is on women. And women ONLY. So he's Straighty McStraighterson as far as I can tell.

Have I ever experienced this or something like it? Only in the sense of enjoying sexual scenarios from a male, as well as female, perspective (though I don't literally imagine myself as a guy, or another woman, for that matter). And, crucially, my erotic focus is on BOTH sexes.

So I'm not a "pseudobisexual"; I'm the real deal :)