He thought he understood the term cum dump.  After all he had been used by men as a depository for their loads his entire life. But this weekend had given the words “cum dump” a new meaning for him. Previously he had always been an active participant in milking loads out of men’s balls, either getting fucked or sucking on dick. For the past several hours, however, he just laid there with his jaw forcibly stretched open, while men jerked off and shot loads into his waiting mouth. None of them even acknowledged him. He was just an object, a place for cum to be dumped.