Haha, where have I seen this before? XD
Imagine Jim getting a GIANT St. Bernard after becoming an admiral because he thinks a pet would be good for him and Spock. Spock is at first alarmed by the dog, but Jim assures him that the dog is actually really lovable and gentle. Spock yields and is okay with the St. Bernard, until he finds out that this giant dog has decided that it is a lap dog and attempts to sit on Spock's lap.