Here is Rick leaving for a run to find something ‘interesting’ for the tyrant he now serves. His son is giving him grief and questioning his decisions. Due to the testosterone being systematically drained from his body by the tyrant, Rick is feeling less than worthy of Michonne.
He is no longer a leader, is helpless to fight back and is half the man he used to be (in his mind).
As he leaves, he’s most likely feeling he’s still on shaky ground with the woman he loves. The woman who most likely has her shit more together than he does.
He leans in to give her a respectful yet chaste kiss because that’s all he feels he deserves to give her after everything that has happened.
But our girl? Our perfect, warrior, in love, Queen??
She is having NONE of that.
Nope. She knows what her man needs and, hell what she needs and plants her life returning, testosterone giving, lips on his.
Rick gets some of his mojo back, Michonne ascends to goddess level of awesome and we all hyperventilate before falling into a heap on the floor.