Alrght, women like penetration because it helps them feel closer to the guy. Based on most of your post, I'd say the odds of you being a femanon is kinda high, but I could be wrong.
Even so, the fatality aspect is too weird...it could be unhealthy. Depending on what your definition of mental health is.
But fetishes manifest weirdly...and just because you fap/shlick to something doesn't mean you're out of your mind. Nevertheless, stuff that you sexualize and orgasm to could have a major impact on your mind, thus your nervous system, thus your whole body.
Personally, I'm a fan of mouthplay and giantesses, but not vore, obviously. Actually, the fetish I'm MOST interested in is a giant woman and a normal-sized guy having sex like any other couple has sex. I like the idea of "conquering" the giant with my penis.