If that were the case, different wording would go much further in relaying a message. Something like "Guys, legal system doesn't like you. On average sentences to men are longer to that of a woman. Women don't really need an evidence of rape for you to be sentenced for it and spend decades in jail for crime you didn't do. Child custody is far more frequently awarded to women even if they are the worse choice. Even if you are not the father you might get forced to pay alimony child support until proven otherwise, after which no money will be returned. Masturbate, it's easier and safer." I'd say that's far better warning.