The difficulty with dealing with a fictional culture is just that, it can be whatever you want it to mean especially since there are few examples in the show. Spock no more represents all of Vulcan with his attitude to emotions and sexual matters anymore than Bones represents all Terrans. Spock was raised to be more Vulcan than Vulcan being the son of Sarek. Showing emotions in his culture is taboo and he took his culture seriously. Yet I doubt Vulcan sex between consenting bondmates is as clinical as you seem to want it to be, my only proof unless Amanda was a frigid masochist she ain't waiting no seven years for sex. As for not being able to 'love Christine', he also agonised that he never told his mother he loved her, you telling me Spock had some biological gene making him incapable of love or any other emotion? Did the Romulans breed out this gene from their race?
P.S STNG episode 'Sarek', Vulcans are more than capable of their version of love and their wives know it. Re 1. Picard being the sinkhole for Sarek's emotions 2. the scene between Picard and Perrin
Spock isn't exactly the same as other Vulcans, so...? The control /suppression of emotion and primal urges is still what defines a Vulcan. There isn't much room for leeway in individuals, unless you just plain rebel like Sybok.
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"Amanda ... ain't waiting no seven years for sex"... !! Sex often goes out of a marriage at some point, with the marriage continuing as a companionship thing. Sometimes injury or dysfunction happens, and the relationship goes on. If you're marrying a Vulcan, you're going to have to make an adjustment like that, with little or nothing in the way of (overt ) love or sex. That's one interesting thing about Babel-- you have to wonder what this relationship could possibly be, how it works, considering, you know...
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It does no good to point out to me (as people keep doing over and over) that sex only every seven years is unworkable. That doesn't change what they hammer into us about a Vulcan 's nature.
Any incongruities concerning their reproduction will have to be taken up with others besides me.
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"you telling me Spock had some biological gene making him incapable of love or any other emotion?" Spock underwent a combination of mental disciplines to suppress and overcome, and neutralize, emotion, love being one of the big ones. I really don't see how they could have made this clearer. This has all been going on so long, and the discipline is so effective and runs so deeply , that some basic impulses necessary to any species are insisting on erupting out onto the surface again-- pon farr. So it's deep suppression and control techniques with a biological element too.
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So in Naked Time, he's agonizing about not being able to feel love for his mother too. It's not totally impossible for him to, but it would mean working his way back out of all the disciplines, and totally denying and turning his back on his Vulcan nature. This is the conflict we're seeing with Spock alone in the briefing room.
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The episode "Sarek" is one of the strongest statements ever about how utterly outside of a Vulcan's world it is to feel emotions such as love, overtly, as humans do. Wife #2 had to infer and assume that love lay somewhere under all those layers of control and detachment. Sarek was certainly never going to say "I love you"... Picard had to do it for him. Look how deep and intense the mind meld had to get, before Picard ran across that love. . . Sarek denies it, calling her "sentimental".
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The whole problem in the episode was Sarek being observed experiencing emotion (as when listening to the music), thus showing he's losing Vulcan control / suppression. The fact that his aides were so alarmed shows just how much neutralizing emotion means to Vulcans.