Well I know with some ships (John/Sherlock, Dean/Cas) one of the characters is actually a virgin in the canon, so if you’re doing a canon base story you either have to run with that or go “Surprise! secret sex off screen you never heard about!”
No, I know that. I mean that I find it weird that it’s actually made into a point of kink, like there’s always some passage along the lines of:
[Resident promiscuous/sexually experienced male character] growled his approval.
“You are so fucking tight, bro” he whispered as he frantically pumped his spermtastic seed into [Resident virginal male character].
[Promiscuous] felt a surge of possessiveness as he stroked his partner’s turgid love wand.
“MINE” he screamed.
The thought of [Virgin]’s sweet ass being touched by nobody’s hot little hands but his own sent him over the edge.
It was sexy.