That's a plot point in The Sting

Yeah.... I will go along with a lot of shit if I think there's a chance I'm going to get laid. Pretty lady assassin is definitely the way to go if anyone is looking to have me killed.

They also lured soldiers to the woods under the pretense of a romantic overture and then killed them. Oversteegen would approach the soldiers in taverns and bars and ask them to "go for a stroll" in the forest.

On NPR one time there was a spy on a program, and they said spies almost never carry weapons, and when they do it's usually a woman because people don't expect it and also there is such a huge taboo about touching a woman's purse that they can put it there and be safe.