Black Widow/Fallout: New Vegas

Black Widow is a perk for female player characters in Fallout 3, Fallout: New Vegas, and Fallout 4.

Effects
This is a mixed combat/dialogue perk, giving a flat bonus to damage against male characters and either unique dialogue options (Fallout 3 and Fallout: New Vegas) or reduced persuasion difficulty against male characters (Fallout 4).

The perk only works against male human and ghoul characters. Animals and creatures like feral ghouls are unaffected.

Behind the scenes

 * Black Widow is a common name for women who exploit men to their advantage, often to the point of exhaustion. It's derived from the mating behavior of Latrodectus hesperus, where the black widow female will often eat the male after copulation, unless it manages to escape.