[This, right here and right now and on the floor of a dream apartment, doesn't feel like a shortcut. Maybe Chekov has entertained the thought of being with Kitty often enough in the waking world for this to seem natural, even though he knows--not now, but usually--that it will never be him.
That isn't a concern now. If dream-Kitty wants love and security and passion, dream-Chekov is more than happy to provide all three. Love, mostly, for the moment; he's content and cozy and just wants to kiss Kitty and luxuriate in the afterglow.]