So many guys choose a female character for PvP because the image is slimmer and thus harder to hit. There is no downside to this (yet) so i propose female characters have menstrual cycles.
Every so often (who knows when!), their AG goes down by 2, CH is forced to 1, ST goes up by 2, vision narrows (Sight goes down by 20 hexes), Close Combat goes up by 100, no NPCs will follow them, and they cannot lead anyone on the map. Oh and their speech in the text bar becomes nearly irrational.