How not to intimidate your DI
Hello, I'm searching for a Mystrade fic. I remember that Mycroft kidnap Lestrade to intimidate him have a friendly chat, but he takes him to a place that have lots of boxes of sex toys, didlos, I think, and Lestrade is "oh, someone said it's very good, can I have one? And Mycroft ends all red and confused. It was quite funny and instructive, because there was a part about the handkerchief color, and is some code? or something.