It is a derogatory slang term used by some radical feminist groups to describe women who choose to enter traditional marriages.

In some regions, donkeys are the main event in entertainment-filled community ceremonies:

Writers often highlight the physical or personality differences between the husband and the "donkey" (a slang term often implying physical prowess or a specific aesthetic) to heighten the emotional stakes.

This lifestyle is – not for beginners. If the fantasy is hotter than the reality, keep it as roleplay (e.g., husband hides in closet while you use a toy and pretend). Many couples thrive on the idea without ever involving a real third.