There were lots of running jokes in the three seasons of Star Trek, TOS (The Original Series). One was how Captain Kirk managed to find romance with every female alien the Enterprise came across. The entire affair was resolved in an hour. Then he was free for the next conquest next week. Star Trek: TNG (The Next Generation) and the newer series allowed the regular characters to pair up and have long drawn-out relationships; Picard and Crusher, Riker and Troi, Data and that tough blonde who quit after the first season... what was her name? For comedic purposes, Captain Kirk and his promiscuous ways are more fun.