Watched it for the first time a few days ago and it felt weird to have that whole irrational ritual with the Vulcans. Like Kirk aptly notes, "I always figured [you choose your mates] very logically". The episode itself wasn't bad, I knew beforehand what really is McCoy giving Kirk in that injection - generally I liked (though not loved) the episode. Not loved mainly because it felt illogical to have Vulcans... mate like animals, to put it shortly. Yeah, I know the repressed, calm ones are the quickest to crack down, but "Naked Time" has done it (Spock breaking up about his mother) much better IMO.
It sort of never bothered me because I just always figured that a) Vulcans are very emotional and volatile under all that reason and logic and thus NEED the logic - to the point of overdoing it - to keep themselves in control and that b) Spock, being the only one really giving us insight about what Vulcans are like, exaggerated a lot. After all, he, being half human, had to be more Vulcan than Vulcans to be accepted.