Well, given the constraints of sixties TV, it's really hard to tell how far things went every time the camera discreetly faded to black while Kirk was sharing a passionate moment with a sexy female guest-star. True, we can only verify a few instances of actual SEX, but, given how often Kirk ended up in clinch with the SFGS, I think people can be forgiven for assuming that there was plenty of fire to go with the smoke--even if the producers couldn't actually show Kirk in bed with anyone. As even Carol Marcus said, Kirk was no Boy Scout! Plus, of course, there's the fact that he kept running into old flames all over the galaxy: Ruth, Areel Shaw, Janet Wallace, Janice Lester, Carol Marcus . . . . That's a lot of long-lost loves for "a stack of books with legs," let alone an obsessive, workaholic loner! One can only wonder how many others there were. No wonder Kirk has a reputation . . .