Except, they couldn't discuss them after the fact. The feelings he already had for her, coupled with her active participation, meant that the chances of merely satiating his urges were slim to none. No, Spock was all but certain that a bond would be formed. He wasn't nearly as certain, however, that she would be pleased for such a thing to happen, especially without her consent.
However he couldn't explain, in his current state. Forming words was becoming more difficult by the moment and coherent thoughts would soon be all but impossible. His plak tow was quickly approaching and with her so close there was simply no way he could deny his urges any longer.
So he gave a mere nod of his head, little more than a jerk really, while sliding his hand across her shoulders to the small of her back. He pulled her flush against him and brought his free hand up to raise her chin enough to peer into her face. "Kah-if-farr," Spock murmured lowly before pressing his lips to hers in a kiss that was as intense as his feelings for her ran and clearly lacking any of the normal control he managed to exhibit when intimate with her.