I think the composition, the colors, and the lighting on this one are excellent ... however, IMO the head-tweak of the left subject spoils (rather than enhances) the overall effect.
If you had been able to get them gently touching heads, while their necks formed a heart-shape, you would have had yourself a perfect shot.
So my honest critique would be ... sooo very close ... and yet sooo very far ...
Jack
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