It really wasn't all because a robot was forcing them. Not at all. Jack wanted it badly, and it was taking all the willpower he had just to drag himself back, out of touching range, away from all that heat and excitement and desire.
Kirk certainly wasn't the only one who was panting.
"Yeah," he said breathlessly, and managed a fleeting grin, even while his instincts were screaming at him to get away while he still could, even though he knew deep down it was way too late for that.
He forced himself to take another step back, out of range - which of course revealed to Kirk's sight just how much effect that kiss had had on him. Not a lot you could hide in a pair of tight Speedos!