The two groups which had formerly a near monopoly on male earrings were Gypsies and sailors. Both has the usual traditions about eyesight, but it was also said that sailors' earrings would save them from drowning, while others argued that should a sailor be drowned and washed up on some foreign shore, his gold earrings would pay for a proper Christian burial. ["Dictionary of English Folklore"]
[earring etymology, earring origin, 英语词源]