3×19 – Requiem for Methuselah

And then the minute McCoy leaves, Spock goes over to the sleeping Kirk, initiates a mind meld for the second time ever even though he previously made his point about how horrid and uncomfortable he finds it, and helps him forget all the heartbreak Kirk’s just gone through.

Bones, you should know better than that by now.

(Possibly it’s also worth mentioning that the love Bones is referring to here is very much the romantic ‘love of your life’ sort, after Kirk fell head over heels for an AI android woman this episode.)