ironing

"But John, it's perfectly logical for you to be the one doing the ironing; the Royal Marines taught you to make a perfect crease every time, while my specialized skills are far better employed with chemical experiments. Besides, a burn blister would surely lower the quality of my violin playing, and I'm certain we both agree the Stradivarius deserves only the very best. Oh, and don't forget to pick up more crisps this afternoon. And the four-inch petri dishes. And at least three different kids of fuller's earth and a carboy of hydrochloric. And mints. Make sure you get the right kind this time, John; surely even you can remember how to read a label."

That evening, Lestrade asked Sherlock about the odd-shaped blister on his jaw, but Sherlock gave him SUCH a look.