Couple of people asked for recs in the comments, and I’ve literally spent 7 hours going through all my bookmarks.
I have too many to fit in a comment so here ya go:
Girls talk boys by Asshole_who_writes_porn - Shane and Rose get tipsy and talk about his relationship with Ilya.
Gossip Girl by Northisnotup - seconding the recommendation by @satanssorrysoul in the comments. Shane has dinner with the Pikes and Rose, and ends up coming out and talking about his boyfriend.
Raise your glass to freedom (and a good old trimming) by phlebotinxm - drunk Shane gives a TEDtalk on anal sex to the Centaurs.
Unhinged Love by Madfordinos - WIP, outsider POVs of Hollanov being kinky and cosmically down bad for each other. Shane and Kip have a very frank discussion of sex in chapter 3.
pretty boring by goldengalaxies - outsiders realising Shane is not as boring as his reputation suggests. Including this because of Shane’s confessions during Never Have I Ever.
I may be bad (but I'm perfectly good at it) by gurlsrool - various outsider POVs of people realising that Shane is kinky.
Finisher of Holes (Allegedly) by tintatalk - a typo leads to an unfortunate nickname. Shane decides to own it.
Putting these in their own category because most of them rely on Shane using the anonymity of ‘Jane’ to be as outspoken as he wants about his sex life.
Jane is Ilya’s Favourite Lay by That_bitch_without_a_life - WIP, rookie Ilya adds Shane to the Boston WAG chat as a way to bond with his team. This backfires on him spectacularly when Shane’s confessions about their situationship result in a vast network of unionised WAGs all trying to get Ilya to cut his fuckboy bullshit, or set Jane up with someone else.
First Time WAG by DadMight - another fun Jane in the WAG chat fic, post-Cottage pre-Ottawa trade.
unknowingly knowing by birdy1171 - WIP, the Boston players steal Jane’s number and become her friend. ‘Jane’ gleefully flaunts ‘her’ ability to influence Ilya with sex. Crack and fluff texting fic, where Montreal are not homophobic assholes.
Jane and Lily are rivals on hockey twitter by MoonlitSunrise - Shane and Ilya each make a stan account for the other, letting little details of their actual relationship slip through.
Lily & Jane Take Over Twitter by winter1477 - stan accounts, rpf, and thirsting galore - except in this one the Cens figure out just who is running the Lily and Jane accounts.
Ilya Rozanov- Harris's Worst Nightmare by justbuckingaround - WIP, okay this one is primarily Ilya being a rage-baiting menace on Twitter BUT occasionally Shane gets very thirsty on main
Battle of the Bottoms by maximum_gender - This one is a spin off to the excellent SocMed series the secret society of stick handlers (where the various lgbt players team up to support each other) so I’d recommend reading that first for context. In this one, Luca and Shane go shopping for sex toys and talk about their relationships and sexualities.