Jeon of rainy day

In Korea, we eat pancakes on rainy days. Some people say that it is because the sound of rain is like the sound of oil splashing when frying pancakes, but I think that in an agricultural society, when it rains, it is difficult to engage in outdoor activities, and if you spend time bored inside the house, you may want to eat something different. In the past, cooking oil was scarce, so cooking with oil was only used on special occasions.