I would hope he would tell her the same thing an old timer I knew back in the 60s told his daughter.
“Keep you legs crossed”.
Mistake #1 is assuming that teen girls in 2015 are these chaste innocent little flowers that apparently existed in the 60s that don’t even know where babies come from and still play with dolls.
Maybe some of these stupid dads need to inform their “little girls”, while polishing their rifles, to not come to him with some made-up story that this boy tried to assault you just because you didn’t like the date or he didn’t dance well enough.