Based on what he knew about Molly's own childhood, there was a part of Sherlock that sometimes took an odd kind of comfort from imagining them as friends had they met far, far earlier in their lives. Of course there was no way to tell now, but it was an idea he rather liked. It was one of those far-from-logical things he didn't talk about if only because he wouldn't know how to begin, but at least he knew he was in the company of someone who wouldn't make fun of him for it.

(Besides, thinking about the two of them as children had started to spark Sherlock's curiosity about what a child of Molly's would look like, a curiosity that was steadily growing greater.)

"I have scuba dived twice, and both times it was work-related. Evidence retrieval rather than fun, which is not to say it wasn't fun at all. Though I like the idea of going looking for shipwrecks. Probably not much pirate gold to be found these days, but plenty of history."

They were close enough, now, that they could just see the river between buildings--a ribbon of gleaming reflected light.

"My turn to guess--your snorkeling was largely in the Mediterranean?"