Flowers are usually a vital ingredient, so you could do worse than My Fair Lady, whose central character is a flower girl in Covent Garden. Mamma Mia! ends in a wedding, and is set on the ideal honeymoon location of a Greek island — so the Prince Edward Theatre makes a perfect getaway for couples who want to forget the February blues. The Tempest at the Old Vic might seem an odd choice at first, but at its heart is the awakening of young love — between Ferdinand and Miranda — and the Old Vic makes a suitably cozy, pretty place to take your partner on a night out.
Laughter is a great aphrodisiac they say, so you could do worse than try the Reduced Shakespeare Company at the Criterion or, if you like musicals, Zipp! at the Duchess.
Alternatively, if you feel like something about the darker side of love — and its cost — then why not try the Eifman Ballet's Tchaikovsky at Sadler's Wells?
Edward VIII's love for Wallis Simpson cost him his throne in 1936, as A Dangerous Woman recalls at the Jermyn Street Theatre, while Noel Coward's 1924 shocker The Vortex (at the Donmar until Feb. 15) shows the dangers of trying to keep playing the dating game long after you should have retired to the "deep deep peace" of the marital double bed.