Staircase scene in tsot is all the littlespoonlock evidence I need. Sherlock on his side, turned away from John, open back an invitation for snuggles. John lying on his back, arms crossed. Closing his back off for snuggles but fighting every instinct to wrap his arms around Sherlock. I bet the first few nights they sleep together it starts this way until they are sound asleep and John's body gives into instinct, arms slowly pulling and wrapping until Sherlock is slotted against his chest.
you can’t fight your big spoon biology, john
It would break him and I would lose him forever.I will N E V E R let that happen.