Sherlock's never dated or been in a relationship and is suddenly showing interest in a young woman he met at a party. Naturally, he goes to John for very personal, intimate, 'hands on' advice. Most likely a one shot. John/Sherlock. Rated M for the ending.

John Watson spends seven years at Hogwarts School of Witchcraft and Wizardry, where he meets the boy who will become the greatest man he'll ever know. Eventual John/Sherlock.