It was early in their relationship. John was still struggling to stay clean, and hadn't been there long enough to not feel like shit. Which is why someone he'd been fucked by, in a writhing mass of bodies and a blurred and alcohol soaked and cocain dusted night in a club, had turned up positive didn't just scare or even terrify him. It convinced him he was going to die.
Which was why he turned up about half drunk on Geoff's doorstep, eyes blood shot and whole body shaking.