"Not just any man is fit to lead in a Domestic Discipline household. For instance, if you’re a man of considerable ego, insecurity or temper then this lifestyle may not be for you. If you are not do not respect your wife as mandated in the book of Ephesians 5: 23-30, then this lifestyle is definitely not for you.
Finally, a husband who enters a DD relationship must be willing to talk to his wife not just about discipline, but about her need to be spanked, what spanking does for her and how she needs it to occur to feel safe, secure, cherished and led. He also needs to be prepared to talk about the sexual aspects of spanking. This is often a touchy subject for Christian couples in DD, because the eroticism of spanking may make them feel kinky and sinful. But a woman’s bottom, I believe, was created not only as an enticement to men but as a target for his hand when she disobeys."
from Learning to Spank by Brent