If for some reason (e.g. this is your dying piece of wisdom) you could say just one thing to your daughter/niece etc, what would it be?
I am torn between 'never let a man talk over/down to you, your voice is just as valid and should be heard' and 'NEVER let anyone touch you in a way you don't like, except for medical necessity. If that happens, scream like fuck then run for it for fight like a demon'.
Really can't make up my mind. The first one more likely to be used (several times a day, maybe) but the second one could be life saving.
Any other thoughts?