how do you identify a playboy,a womaniser ,a rapist or the one who has absolutely 0 humanity when doing such degenerate things from his natal chart?exactly what planetary combinations make this ?
Stop wasting people's time using the anonymous service when you don't need it.
As for your question, you learn to identify those by studying charts of people who are like that and comparing with the basic knowledge of astrology on JoS. It's common sense. It doesn't need a high IQ nor does it need to pester JGs by email, disrespecting their time.
Not everyone is addicted to technology or has immense free time.