Those looks.
The way Sherlock is watching John as he’s buttoning up his jacket. He’s not looking at his own reflection, he’s looking at John.
And then John’s eyes flick over to him.
That’s a pretty intense look, boys.
Doesn’t it seem like they just had sex and Sherlock just can’t get how amazing John’s body is out of his head and he’s staring but John’s like “no we just had sex and we’re dressing up so no we’re not going for the second round”