If you're interested in RTYIs there's Ravish Me (http://archiveofourown.org/works/641123) by amalnahurriyeh. It's not exactly what your prompt calls for, but it's pretty close, with Sherlock testing lipsticks on himself and John being suddenly very interested.

Also, I second the heck out of this prompt. Especially with the top!John and virgin!Sherlock parts included.