I’m not sure how much truth there is to this but according to a March 15th, 1967 article in The Los Angeles Times, after dropping its sponsorship of Petticoat Junction Proctor & Gamble refused to sponsor Accidental Family and instead chose to support The Mothers-In-Law . Both were new sitcoms for NBC. At the time, Accidental Family was still called Everywhere a Chick Chick. Wrote Hal Humphrey:
Anyway, P & G settled on Mothers In Law after the company’s brass turned down sponsorship of NBC’s Everywhere A Chick Chick because it looked immoral to them. Everywhere A Chick Chick stars Jeryry Van Dyke and Lois Nettleton in a comedy cross between Green Acres and Family Affair. Jerry (a night club comic) whose divorced wife remarries, winds up with his offspring on a farm already tenanted by Lois Nettleton. It’s possible too, of course, that P & G thought the farm locale wasn’t conducive to selling soap. There must be a survey somewhere to prove that farm people don’t hold soap in such high esteem as mothers-in-law.
Also, according to Herb Lyon, Jerry Van Dyke was responsible for getting Everywhere A Chick Chick (what he called an “unbelievable handle”) renamed Accidental Family .