There is not such a thing as "just sex" - sex has meaning that differs from person to person, situation to situation, etc. There is not such a thing as "just sex". Sex can convey all sorts of messages, too. It can evoke all sorts of feelings.

Oh, and a guy who gets it up from porn but then has sex with a real woman - which seems to be what you are describing - is making a choice to have sex with the woman rather than masturbate, so he is still, on some level, attracted to that woman - otherwise he'd be masturbating solo.