"Never trust a dame."----1940s movie saying.
In the old noir films and my favorites the DVD complete series of Mike Hammer, Peter Gunn, Mr. Lucky, the FBI (Efrem Zimbalist ones) and others, it often comes true.
Harlan Ellison refused to allow his name on a Voyage to the Bottom of the Sea screenplay credit once. Producer and Director insisted the woman be the villain again. As with about 85% of the plots, the sneaky, two-faced, cruel, selfish woman turned out to the be evil killer and plotter to set off a nuclear war or destroy the American Pacific Fleet or blow up the Seaview, etc.