Because you were unhappy so you wanted me to be unhappy, too. Now you’re happy again, you'll be nicer… for a while.
"What have you done to your hair?" John exclaims. "Don't you like it?" Sherlock asks shaking out his exceptionally voluminous curls. "You look like a porn star," John replies. "THAT'S EXACTLY THE LOOK I WAS GOING FOR!" Sherlock exclaims. "You wanted to look like this?" John questions. "My stylist said that this was fuck me hair and that if I didn't get laid within 24 hours she'd give me my money back," Sherlock explains, "so do you want to fuck me?" "Oddly yes," John nods taking off his jumper.