Festival of Colors

Sherlock has trained himself to come on command - untouched - using two keywords. One to get hard and the other to orgasm.

After spending a month secretly perfecting his technique, he shares the results with John. Naturally, John wants to know what the keywords are which Sherlock refuses to give him. He doesn't want anyone having that much power over him. Not even John.

John is offended by this - although deep down, he knows that Sherlock's right - and determines to figure out the trigger words with or without his help.

Sherlock tells John that he'll never figure it out because Sherlock's smarter than most people, John included. So John decides right then and there that not only will he figure out the words, but he'll use them at the first opportunity to teach Sherlock a lesson.

With great power comes great responsibility.