Mom and daughter issues

Why when you go to your mom about your body she feels as if you are too young to think about “adult stuff” for example masturbation. When the parents find out there teen son is masturbating they always turn around and say it’s a boy thing ,But when a teen girl does it the mother always says your acting too grown or your fast. Us teen girls go threw body changing and being sexually aroused too. The dad always talks to his son about masturbating but the mother never talks to her daughter about how she could handle it when she’s in that type of situation. Like we can’t ignore the fact that we are horny! (I’m a 15 yr old girl by the way). Moms just can never handle the fact that there teen daughters is growing up now and most likely is 15 years old going threw the same body experiences as there 35 year old mothers!