How long after a double mastectomy before you can have sex?

It depends: Having sex involves many physical, emotional and consentual factors. It also has many ways and moods. So there is no one answer to fit all. When you feel physically comfortable and emotionally ready you may become intimate with your partner. It may be only in a few days or may take many months. If emotionally you did not feel ready when physically you are, counselling may be needed.