I liken the Dozy Embrace to a chaste but meaningful kiss, while the embraces and kisses in SNIT and in the reunion scene are more about passion as much as about love.
It is interesting that Jack remembered an embrace rather than a kiss. It is hard to disassociate passion from a kiss shared by 2 lovers, no? For me, it is telling that an embrace is used to signify sexless desire. It reminds me of some of Burne-Jones paintings of sexless/quasi-religious embraces, as opposed to Rossetti's more voluptuous representations of kisses and embraces.