Here's why:
* Verb tense: The sentence mixes past tense ("did") with the present tense ("kissed"). The correct past tense form of "kiss" is "kissed."
* Word order: In this context, the auxiliary verb "did" should come before the main verb "kiss."
The correct way to phrase this is:
* Did he kiss you yet?
This sentence uses the correct past tense and proper word order.