First of all, Gillian didn't want Kirk. She wanted to stay with the whales.I dont know if Kirk could "get the girl" if he was really into it (probably, because the Antonia example), but in IV he was clearly a man with a mission. He charmed Gillian, like so many alien women in TOS, in order to gain a tactical advantage. And he got her to spit out the secret whale's pregnancy, the details of the jet transport and the transmitter frequency. At that point he would leave her in the 20th century -- and would have, if she wasnt crazy enough to jump on his neck during transport.Gillian wasn't dating anyone (unless it was mentioned in the novelization; it's been many years since I read that, so I don't recall), and when she asked to go to the future, she stated, "I've got nobody here!"Nope. I didn't see any such scene, either.
Plus, she dumps Kirk when they get to the 23rd century, so the birthday angle doesn't hold up, either....
Kirk tried to charm her in the pizza restaurant (it didn't work), and at the end of the movie he asked how to reach her, as he didn't even have her "phone number." She said, "I'll find you," gave him a kiss on the cheek, and left.
Yep, Kirk finally found a woman immune to his charms.![]()
EDIT: also he made her pay for the pizza even as he had money from selling the antique glasses. (and took the pizza with him!)
And Gillian didn't spill the beans about Gracie's pregnancy - Spock did.
As for Kirk expecting Gillian to pay for the pizza, I've already made this point in another thread on another topic: Kirk is unfamiliar with cash. Not money as a means of economic exchange, but cash. We don't know how much he's spent up to that point, but we do know that Kirk has no idea whatsoever about the value of things. As he said to the crew: Don't splurge. The money they got from selling his glasses is all they've got.
Plus, Gillian invited Kirk. Of course he would expect her, as the one who extended the invitation, to pay.
The beer was nothing more than product placement.What actually I wonder about that pizza scene is, what was in those beers? Girl takes one sip and start to laugh and tell all her secrets. Kirk doesnt do better: he promptlly confess he is an space and time traveler(!!!)
Aparently cetacean biologists cant handle themselves with alcohol, and saurian brandy and romulan ale arent nearly as strong as 20th century Earth beers.