Showed that huge proc in /atom what polymorphism' is.

Now instead of huge condition line it's handled where it was supposed to be handled.

code/modules/mob/living/carbon/human/human.dm

@@ -1084,4 +1084,15 @@
 		if (germs == 2500)
 			world << "Reached stage 3 in [ticks] ticks"
 	world << "Mob took [tdamage] tox damage"
-*/
+*/
+//returns 1 if made bloody, returns 0 otherwise
+
+/mob/living/carbon/human/add_blood(mob/living/carbon/human/M as mob)
+	if (!..())
+		return 0
+	//if this blood isn't already in the list, add it
+	if(blood_DNA[M.dna.unique_enzymes])
+		return 0 //already bloodied with this blood. Cannot add more.
+	blood_DNA[M.dna.unique_enzymes] = M.dna.b_type
+	src.update_inv_gloves()	//handles bloody hands overlays and updating
+	return 1 //we applied blood to the item