Whedon's "Much Ado About Nothing" added many visual details to the text of the play. One of these appeared to be a prior sexual relationship between Beatrice and Benedick. However, it's not exactly easy to follow the dialog. Was this a correct interpretation of events? If so, was this at all referenced in Shakespeare's dialog, or was this an extrapolation by Whedon?
From the text:
So, at some point in the past, Benedick told Beatrice he loved her (he lent her his heart). She returned his love ( gave him use for it, a double heart for his single). However, he was not faithful (he won it of me with false dice, i.e. he cheated). Therefore she insults him/keeps him at arms length because of how he treated her.
Now, Whedon presents this as a sexual relationship, possibly a one night stand, during the prelude/opening credits. Given the horror of Hero's assumed loss of virginity, however, this would NOT be the original intent of Shakespeare.