How to describe a man or woman that you suspected of
lewd behavior, such as not being
a virgin prior to marriage.
Prior to the 50s in the United States, this is how you would describe an undesirable date or social relation.
example:
"He and his gang, were to be avoided, like most people of questionable virtue."
Owing to the infamous double standard in this country, men for years were allowed to have premarital sex with little social consequences, but any woman who was even suspected of having sex was described as a woman of
questionable virtue.