To single ladies: do not sing while cooking or eating, or you will end up with an old husband! This taboo came from the fact that the rice will be burnt (rice cookers didn’t exist in the old time, and people had to use coal) or you will accidently cut yourself with the kitchen knife if you don’t pay attention while cooking. This taboo was used to scare ladies working in the kitchen, as ladies at that time usually feared getting old husbands.