Know Your Carrots

The young farmer had been at the cattle mart and was not too clean nor did he smell too well when he hopped into the jeweller's shop to purchase a signet ring. The assistant could not help her automatic stepping back from the smell and, indeed, the young man could not avoid noticing her action but he still asked the young lady to let him see some signet rings.
'Eighteen carats?' asked the assistant.
'No, atin' onions,' answered the young farmer.