The science of detecting a Whore. This "science" is almost an art form. It is the very precise and acute way that someone can detect if a woman is a "Whore". This science is inherent in all men but becomes more robust as they encounter more whores and know what to look for.
When a relationship ends, and your ex goes off the deep end with the rebound sex and ends up turning into a full time whore with a revolving door for a vagina.
Wow, after we broke up, Katie really started whoring around...her whoreformation was complete when she let a random she met on the net cum on her face in a viewing room at a porno store.