Having organs should no longer prevent vent crawling.

code/modules/mob/living/living.dm

@@ -660,6 +660,26 @@ default behaviour is:
 	resting = !resting
 	src << "\blue You are now [resting ? "resting" : "getting up"]"
 
+/mob/living/proc/is_allowed_vent_crawl_item(var/obj/item/carried_item)
+	if(istype(carried_item, /obj/item/weapon/implant))
+		return 1
+	if(istype(carried_item, /obj/item/clothing/mask/facehugger))
+		return 1
+	return 0
+
+/mob/living/carbon/is_allowed_vent_crawl_item(var/obj/item/carried_item)
+	if(carried_item in internal_organs)
+		return 1
+	return ..()
+
+/mob/living/carbon/human/is_allowed_vent_crawl_item(var/obj/item/carried_item)
+	if(carried_item in organs)
+		return 1
+	return ..()
+
+/mob/living/simple_animal/spiderbot/is_allowed_vent_crawl_item(var/obj/item/carried_item)
+	return carried_item != held_item
+
 /mob/living/proc/handle_ventcrawl(var/obj/machinery/atmospherics/unary/vent_pump/vent_found = null, var/ignore_items = 0) // -- TLE -- Merged by Carn
 	if(stat)
 		src << "You must be conscious to do this!"
@@ -722,8 +742,9 @@ default behaviour is:
 
 	if(!ignore_items)
 		for(var/obj/item/carried_item in contents)//If the monkey got on objects.
-			if( !istype(carried_item, /obj/item/weapon/implant) && !istype(carried_item, /obj/item/clothing/mask/facehugger) )//If it's not an implant or a facehugger
+			if(is_allowed_vent_crawl_item(carried_item))
-				src << "\red You can't be carrying items or have items equipped when vent crawling!"
+				continue
+			src << "<span class='warning'>You can't be carrying items or have items equipped when vent crawling!</span>"
 			return
 
 	if(isslime(src))