Possibly, I'm Insane

rifleman_lincoln 

John thinks Oliver should take lessons. As if there’s anything Oliver could learn from other people!

“It’s just that it’s good for kids to learn new skills. Karate—”

“I can teach him self-defense skills.”

“—or cooking—”

“Cooking is just chemistry, I can teach him that, too.”

“These would be edible cooking lessons.”

Sherlock glares at John.

“Ice skating lessons?”

“Stupid.”

“Dancing,” John concludes. “He could learn dancing.”

“Why would Oliver need to know how to tango?” Sherlock asks disgustedly.

“He might want to woo someone someday. I’d like it if you knew how to tango, for instance.”