Vox points out the feminine imperative in action in his post Regulating sex:

Women desperate to become mothers are increasingly signing up for sperm donation websites where men are offering ‘natural insemination’ only.

See Vox’s full post for the larger quote from the Daily Mail, but this single sentence captures the essence of the twisted frame. These noble women are trying to create life, but the evil men want to force them into having [dirty] sex!

If this were instead an example of a masculine imperative the sentence would read:

Women are setting out to have illegitimate children in as cold and clinical a fashion as possible, yet men are insisting on a human connection as a minimum requirement for their first act of fatherhood.

Of course neither frame represents true sexual morality.