ep3_ai_castration_target_trigger

ep3_ai_castration_target_trigger = {
	age < 12
	is_male = yes
	OR = {
		AND = {
			exists = liege
			liege.culture = { has_cultural_parameter = family_castration }
		}
		AND = {
			NOT = { exists = liege }
			culture = { has_cultural_parameter = family_castration }
		}
	}
	is_available = yes
	is_landed = no
	is_betrothed = no
	NOR = {
		#Should not be close family of a player
		any_close_family_member = {
			is_ai = no
		}
		#Should not be close family of a character who can use the interaction
		any_close_family_member = {
			highest_held_title_tier >= tier_county
		}
		#Should not be the child of a playable title heir
		any_parent = {
			any_heir_title = {
				tier >= tier_county
			}
		}
		#Should not be the grandchild of a playable title heir, if their parent is the eldest son
		any_parent = {
			any_parent = {
				highest_held_title_tier >= tier_county
			}
			any_sibling = {
				count <= 0
				is_male = yes
				age > prev.age
				house ?= prev.house
			}
		}
	}
	#Not already a eunuch
	is_eunuch_trigger = no
	NOR = {
		#Doesn't have a positive trait being a eunuch would ruin
		has_trait = physique_good_1
		has_trait = physique_good_2
		has_trait = physique_good_3
		has_trait = fecund
		has_trait = strong
		has_trait = sayyid
		has_trait = giant
	}
	OR = {
		is_lowborn = yes
		has_trait = bastard
		#Sons of barons are valid if they have an elder male sibling
		any_sibling = {
			count >= 2
			is_male = yes
			age > prev.age
			house ?= prev.house
		}
	}
}

As written in game/common/scripted_triggers/07_ep3_triggers.txt.