Three short lines, and almost nothing happens: a kiss, a smile, more kissing. That plainness is the point. The speaker doesn't describe how he feels or explain why the moment matters. He just reports what happens, step by step, and lets the simple sequence carry the emotion.
Notice how the poem moves. The first line is the speaker's action, the second is her response, and the third is shared: "We kiss some more." The shift from "I" and "she" to "we" quietly shows two people becoming one unit. Her smile works like an answer, a sign that the kiss was welcome, and it opens the way for the next one.
The mood is warm, easy, and a little shy. There is no drama or doubt, only contentment. The phrase "some more" sounds casual, almost like the speaker can't quite believe his luck and doesn't want to overthink it. The poem's brevity mirrors the moment itself: small, sweet, and complete.