Information is power!
Although most of the time, cultivators in immortal cultivation world believed in sheer pure power, the role of information could never be underestimated. Even if it was just a gossip, it could play a role at a critical moment.
Although these several girls of Yin and Yang School looked innocent and ignorant to worldly affairs, they were by no means naive. They freely made their moves on Wang Lu out of their friendship and trust for Wang Wu. However, if because of that Wang Lu became so presumptuous, by planning to take inappropriate advantages, these girls were really not that silly to fall for it. For example, if Wang Lu brought up the idea to pass on the secret of Yin and Yang Transformation, the girls would certainly raise their vigilance immediately and just keep their quiet.