Nothing wrong with a girl twiddling the taco here and there.  I think it's healthy and important.  I've always taken the approach that if a girl can't please herself, she can't give me as good directions if they're needed.  
  
I've dated a girl who masturbated.  She'd use hands and/or vibratory tools.  In no way were either of them detrimental to our love makin.
b