Fixes heroine bud being able to be removed by drag-dropping (#59405)

Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>

code/modules/research/xenobiology/crossbreeding/_clothing.dm

@@ -108,13 +108,22 @@ Slimecrossing Armor
 	w_class = WEIGHT_CLASS_TINY
 	throw_speed = 1
 	throw_range = 3
+/obj/item/clothing/head/peaceflower/proc/at_peace_check(mob/user)
+	if(iscarbon(user))
+		var/mob/living/carbon/carbon_user = user
+		if(src == carbon_user.head)
+			to_chat(user, "<span class='warning'>You feel at peace. <b style='color:pink'>Why would you want anything else?</b></span>")
+			return TRUE
+	return FALSE
 
 /obj/item/clothing/head/peaceflower/attack_hand(mob/user, list/modifiers)
-	if(iscarbon(user))
-		var/mob/living/carbon/C = user
-		if(src == C.head)
-			to_chat(user, "<span class='warning'>You feel at peace. <b style='color:pink'>Why would you want anything else?</b></span>")
-			return
+	if(at_peace_check(user))
+		return
+	return ..()
+
+/obj/item/clothing/head/peaceflower/MouseDrop(atom/over, src_location, over_location, src_control, over_control, params)
+	if(at_peace_check(usr))
+		return
 	return ..()
 
 /obj/item/clothing/suit/armor/heavy/adamantine