The forms sacrifice might take vary considerably. In contemporary sacrificial rites, there is an overall emphasis on the sprinkling of blood, especially that of turkeys. In the pre-Spanish past, sacrifice usually consisted of animals such as deer, dog, quail, turkey, and fish, but on exceptional occasions (such as accession to the throne, severe illness of the ruler, royal burial, or drought and famine) also came to include human beings, adults as well as children. The sacrificed child may have served as a 'substitute', a concept known from curing ritual. Partaking of the sacrifice was common, but ritual cannibalism appears to have been exceedingly rare. A characteristic feature of ancient Mayan ritual (though not exclusive to the Mayas) were the "bloodletting" sessions held by high officials and members of the royal families, during which the earlobes, tongues, and foreskins were cut with razor-sharp small knives and stingray spines; the blood fell on paper strips that were possibly burnt afterwards.