First, I gather my entire tribe. We have this jewel encrusted toilets hidden in the grotto we live in. We chant "Poop poo stuff poo!" in an ancient language as we travel to the toilet. While we walk there, we start thrusting our toilet spears into the skies, trying to the Feca, goddess of feces, to notice us. As we get to be clearance the toilet is in, we put whoever needs to defecate on the toilet. If the person sacrificing his stuff fails to stuff, he leaves and someone takes his place. If everyone fails, then we offer our urine again to Uri, God of urine. Once either of them have a sacrifice, we flush the majestic toilet and chant our way back to the tribe. Wether it rains or not the next day proves we had a worthy sacrifice.
So, what do your tribes do?