my personal take on the s3 kiss or, for some, the lack of kiss.
I feel that on s2, crowley and aziraphale were putting a lot of effort into making Maggie and Nina fall in love with each other. how can an angel and a demon make two humans fall in love?
for aziraphale - a ball. they dance together and, by the end of the night, they realize theyve been deeply in love with each other.
but for crowley, is a sudden rain. caught by surprise, they both seek cover beneath a canopy, they stare into each other's eyes and then... they kiss. va-voom!!
so, after gabriel and beelzebub run off together and after seeing Nina and Maggie get somewhat along in their own terms, crowley decides is his turn to make a move on their lover. but what exactly?
after he professes his love and tries to convince aziraphale to stay - for the bookshop, for himself - to no success, he tries one last thing. it could only be it, right? what humans have been doing for the past 6 thousand years? crowley's ideal scenario to make love finally happen is with a sudden kiss, and that's what he does.
on s3, however, there are no longer humans, and in a few instants no longer themselves will exist anymore. there are no idealistic conceptions of love from fictional pieces, nothing to compare to or get inspiration from.
in the end, it's them. solely, purely. after all, they're not humas and never were. they didn't need a dance, a sudden rain or a canopy. they needed each other, and they knew that they had it.
a symbolic gesture, an ode for crowley's action the first time they got separated in the bookshop. a reciprocation. this time is aziraphale who touches her lips on crowley's. not rushed or in an urge, not trying to prove anything or finally make their love come true, because there was not need for it anymore. they loved each other, and they both knew.
this was the second time they got separated at the bookshop, for what they thought it would be forever.