I don't think the amount of porn you've watched has anything to do with it. Probably depends on the person. I mean, most porn is predictable.
They typicallt start out with some skank hoe doing bullshit I don't care about, or the director talk to her as if anyone gives a shit. Then she plays with herself and that shit is boring 99% of the time unless she's REALLY hot. Then some guy comes and she sucks his dick. Then, depending on circumstances he eats her out or they go right for the kill. Sometimes they switch it up so that the guy eats the gal out first and then they go for a blow job. Then, usually, cowgirl or reverese cowgirl is the first position they do. Then it's sometimes doggy style. Then sometimes it's the missionary. Then the girl sucks the cock some more. Then the guy probably fucks her more if he can take it, then he cums on her face, tits, butt cheeks, tongue whatever.
It tends to get quite canned, and since most of the females are barely into it nearly as much as the dudes -- and since I'm not gay, I'm all about the females -- it doesn't excite me at all since it's all so predictable. Then you got these porn girls who suck at this stuff; girl just licks the head of the penis or whatever, and doesn't shove it in her mouth. Girl sucks cock at the speed of a fucking turtle. et cetera. If I watch porn, I want hardcore shit, not this wimpy stuff. I'm talking Anastasia Blue shit.