You know, I've always been of the mind that great liars do come to believe their own lies, at least on some level. I suspect there's a degree of self-deception going on with Phil. Then again, Phil is also extremely stupid, gullible and inexperienced (especially for someone who lives on the fucking street). Now, on some level, I believe Phil knows he isn't a Latina, let alone a beautiful woman. In fact, I believe he even confessed to Tweaker that he felt insecure about it. On the other hand, he's been trying very hard to convince himself that he's Puerto Rican and/or Mexican (and, for that matter, gay, bisexual, intersexed, transvestite, transgendered, Communist, Nazi, Wiccan, Buddhist, etc, etc.) through tattoos, through shit he posts on Tumblr, and so forth. While he can obviously see he isn't Latin and isn't a woman, he may believe some of his other lies about his gender, politics and sexual identity. He definitely seems to have a chip on his shoulder there.
I think stuff like 'daddy rape day' is more ambiguous. While I'm sure he no doubt is aware he didn't have sexual congress with his father, I do think he believes he was 'sexually assaulted,' partly because his mother seems to have told him he was, and partly because SJWs have distorted the word 'rape' to mean anything they want it to mean. So Phil may actually believe he was 'raped,' and not spanked for being an unruly little autistic shit.
The SJW thing is another issue here. While even they have mostly dropped the 'head mates' crap, there is still a retarded trend where SJWs tell people that you are (or can be) whatever you believe you are. For idiots like Phil, that means if he claims he's a slim young Hispanic woman, then he obviously is, and we're all idiots and meanies for not recognizing him as one.