Uhura and Henry had already done the job of alerting him to the tablet being on, so Kirk was more fidgety about it being Buffy who responded and not over the tablet turning on of it's own accord. He feels embarrassed, recalling all that he'd said to her and how shy he'd been. The way he talked about his dad... He must've been annoying.

"Regretting all that junk food I ate," he finally answered. His younger self had taken full advantage of the fact that the hatches would give him anything. "And wishing I could wipe all that from everyone's memories, yours included."