Santa's Baby?

It's a question that comes up once a year or so, but why doesn't Santa have children?

The roots of Mr. Claus are found in the biography of Catholic Saint Nicholas (no definitive word whether the progenitor spawned or chose otherwise). A Mrs. Claus can be traced back at least 100 years — at least as far back as Goody Santa Claus, the poesy of Katherine Lee Bates, also author of American the Beautiful.

He'd probably be a good dad. He seems to care for children. He works at home. From all sources it appears he has found a pretty good work-life balance — working only one night a year. If it's a medical thing Kris and the Mrs. could always adopt. One gets the sense they'd both like that.

Would St. Nick be more likely to have or adopt if he were not eternal and wanted a namesake to carry on the family business?

What is the answer to the mystery of Santa and a bunch of other good men walking the earth who would likely make good dads, but haven't done so yet?