sweet sake
酩 centers on a specific type of sweet alcoholic drink: sweet sake. It is a narrow, specialized term rather than a broad concept.
酩 combines 酉 (sake jar) with 名, which likely contributes the sound. The character is used for a sweet variety of sake.
The sake jar 酉 on the left and 名 (name) on the right suggest a sake so sweet it earns a special name. Picture a labeled jar of sweet sake.
For メイ, imagine a sweet sake named after the month of May: May -> メイ, and the jar bears the name of the sweet brew.