How did Baby-Mama and Baby-Daddy become social norms?

The Oxford English Dictionary defines baby-daddy as "the father of a woman's child, who is not her husband or (in most cases) her current or exclusive partner." The baby-mama entry follows the same template with the genders reversed.

The OED lists baby-daddy and baby-mama as "colloquial, chiefly African-American" variants of the Jamaican terms baby-father and baby-mother; its first citation for baby-mother hails from the Kingston Daily Gleaner in 1966. (source: www.slate.com/Julia Turner)

On today's show, Miss Mo & Jay discuss why baby-mama and baby-daddy have become social norms.