There were many incense products in the Song Dynasty. Why did elephant painting choose scented candles as a joint product?

In the book Liang Lumeng in Song Dynasty, it was mentioned that when getting married in Suzhou and Hangzhou in Southern Song Dynasty, after the bride price was accepted, the woman prepared incense sticks and offered tables in the hall of the house to let the world know. In a room full of fragrance, guests celebrate this happy event, lighting red candles and cutting candle cores, which is an essential part of the wedding night. In the Song Dynasty, [Xi Candle] inherited the customs and habits left by China since ancient times, painted a pair of incense-expanding candles in the shape of elephants, took the auspicious "elephant" as a symbol of happiness, and attached [plum wine] incense to congratulate the couple on their sweet and drunken days in the future.