Spotify knows what music you're having sex to

Music fans have compiled 2.5m playlists for getting it on, with a healthy mix of cool, romance - and Celine Dion

Intro, the first song on the debut album of indie rockers The XX, is already fairly ubiquitous, appearing on adverts, trailers and low-budget montages in police procedurals.

But according to Spotify, it also dominates another arena: the bedroom.