I commentficced but then I was too lazy to post it in the comments so its at a03. 1900 words of nick/harry fic based on this prompt:
Harry goes to Nick with his questions about being sexually attracted to guys. Like, "How do you know if what you're feeling for your mate is, er, romantic?" Nick assumes Harry is asking because he's attracted to someone else (augh, okay Louis) and tries to answer Harry's questions honestly and gently. He's surprised when Harry barrels into him and kisses him and ruts all over him because omg what.
hahaha, UGH, MAKE IT STOP.
or, you know, read it here:
it had to be you