I honestly think you shouldn't look at porn to figure out your sexuality. What you see there, is not how real life works and that you are not attracted to zoom-ins on pornstar genitals doesn't say anything about how you feel about the real thing in the right situation.
How much does it matter for how attractive you find someone?
Its the other way around. If I find someone attractive in the first place determines how much I'm into their penis/vagina. Its way differnt, if you are into a person or if you are watching random people on screen.
Edit to add: trimmed

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