instill_virtue_trait_effect

instill_virtue_trait_effect = {
	save_scope_as = child_character
	# Find fitting trait
	random_trait = {
		limit = {
			has_trait_category = personality
			save_temporary_scope_as = temp_trait
			scope:child_character = {
				rite = {
					trait_is_virtue_rite = scope:temp_trait
				}
				NOT = {
					has_trait = scope:temp_trait
				}
			}
			NOT = {
				any_opposite_trait = {
					scope:child_character = {
						has_trait = scope:temp_trait
					}
				}
			}
			trigger_if = {
				limit = {
					this = trait:lustful
				}
				scope:child_character = {
					character_is_teen_or_older_trigger = yes
					NOR = {
						has_sexuality = none
						has_sexuality = asexual
					}
				}
			}
		}
		save_scope_as = virtue_trait
	}
	# Instill the trait
	if = {
		limit = {
			exists = scope:virtue_trait
		}
		scope:notification_character = {
			send_interface_toast = {
				type = event_royal_court_good_with_text
				title = wet_nurse_instill_virtue
				desc = wet_nurse_instill_virtue_notification_desc
				left_icon = scope:wetnurse_trait_giver
				right_icon = scope:child_character

				scope:child_character = {
					add_trait = scope:virtue_trait
				}
			}
		}
	}
}

As written in game/common/scripted_effects/00_court_position_effects.txt.