Kirk is infected with Elaan’s tears, which are like a super love potion that made him fall in love with her. Even though, when Spock talks to him, Kirk listens to his words and acts against her wishes.
Spock himself later explains that Kirk can resist to the tears because “the Enterprise infected the Captain long before”… I don’t know, Spock, “the Enterprise” includes is a lot of things for Kirk, and I think you are a big part of it. :)
[s3 e13 - Elaan of Troyius]











