“There’s nothing inherently sexy about arousal cues. Therefore, nobody goes to them…”

You’re trying to sarcasm your way around a syllogism that doesn’t follow. Arousal cues work because of conditioned association. That’s the point. Still not “inherent.”

“Omit the anatomy and see how much context you sell.”

Sure. Now omit the context and see how much bare anatomy sells. Oh right, that’s why porn has genres, costumes, settings, and storylines.

“You quite literally do [get horny from photons].”

No. You get visual input from photons. Interpretation happens in the brain. By your logic, a baby looking at porn would pop a boner. Try again.

“You’re arguing against how eyeballs work.”

Nah, I’m arguing against how your brain works; specifically, its need to reduce complex psychological responses to caveman-tier hot take bullshit.