Fox News contributor Dr. Keith Ablow has described a California law replacing references in state law to “husband” and “wife” with “spouse” as “nuts.”

(Related: Gov. Jerry Brown signs bill recognizing marriage equality.)

During an appearance on Fox & Friends, host Anna Kooiman asked Ablow: “California's governor just signed a law that replaced 'husband and wife' with 'spouse' under the state's marriage laws. The law will go into effect January 1, 2015. Dr. Ablow, normal or nuts?”

“Get ready for the cards and letters. Nuts,” Ablow responded. “Here's the thing, the state needs to get out of the marriage business because here's what we can expect. There's no way that the state of California can deny a marriage license to four spouses now. Eight spouses, or I would say three human spouses and the canine they absolutely love because if love is the foundation of marriage, they can love their dog, too.”

The National Organization for Marriage (NOM), the nation's most vociferous opponent of marriage equality, also criticized the move in a blog post.

“Further proof that redefining marriage is not simply about 'equality' or expanding the institution to include more kinds of relationships; it is about fundamentally altering the meaning of the institution itself, and discarding terms like 'husband' and 'wife' to 'the ash heap of history,'” the group said.