A slut-factor is a scale for quantifying the sluttishness of a girl from 0 to 10, with 10 being the 'ultimate slut' with no ethics. A girl with a slut-factor of 0 is a very nice girl.
Different individuals or organizations can create different computation methods to calculate slut-factor.
Girl-1 : Girl-2 has slept with almost all the freshman guys; she has a perfect 10/10 slut-factor.
A scale of judging the looks, smartness & suavity of a guy ranging from 0 to 10, with 10 being the ultimate stage of perfection. Girls are enamored by guys with high stud-factors.
Different individuals or organizations can create different computation methods to calculate stud-factor. If an organization, say XYZ Corporation, computes stud factor, it'd be termed as the 'XYZ stud factor'.
Jane : John Doe is a very handsome intellectual & has a great demeanor. I'd give him a stud-factor of 9