Maybe there are reasons why he shouldn't. Rules. Conventions. But he can't bring any to mind right now; he doesn't want to.

Certainly there are reasons why he should. He wants to. He knows Inty wants to. (with a connection like that, mightn't they even be meant to?) That can be reason enough.

So (with the delicate care afforded to priceless and beautiful pieces whose treatment must be without flaw) he gently kisses her forehead.