Hey Nonny!
It’s most definitely the scene from HLV that confirmed it. But also the fact that John was doing his dick walk in HLV WITH A TIRE LEVER SHOVED DOWN THE FRONT HIS TROUSERS. BETWEEN HIM LEAVING HOME AND HIM AT THE FLAT WITH SHERLOCK. WHICH WAS POSSIBLY A COUPLE HOURS. HE SAT DOWN. HE STOOD UP. HE FOUGHT A DRUGGIE WITHOUT FLINCHING. AND STILL WALKED LIKE SHERLOCK SAYS JOHN ALWAYS DOES.
Which means
John’s used to accommodating for a lot of room in his pants.
Plus there’s Sherlock’s classic look of shock:

Even he couldn’t properly deduce the size of John’s junk. He may have thought he was joking back in the lab, but here’s the confirmation.
And then John ACKNOWLEDGES he’s got big junk by cracking an erection joke. LIKE.
It’s canon, as far as I’m concerned. And I love silly questions like this
Published on August 02, 2016 11:32