Franklin Urges Against Promiscuity in This Virtue

Puzzle 3 of Architectural Styles Hard Pack

Question is: Franklin Urges Against Promiscuity in This Virtue

and the answer is: CHASTITY

Word Meaning:

CHASTITY — The quality of being chaste: the state of abstaining from any sexual activity considered immoral; avoidance of sexual sins.

Definitions from Wiktionary.