Is Fifty Shades of Grey appropriate for a first date?

The trailer for the Fifty Shades of Grey movie, based on EL James's best-selling book of the same name, has been released.

But, for those planning a trip to the cinema on its release next February, who is it appropriate to ask to accompany you to the cinema?

London Evening Standard's Rosamund Urwin and etiquette consultant Diana Mather debate the issue.

First broadcast on BBC Radio 4's Today programme on Tuesday 29 July