Movie: A Guide for the Married Man (1967)

Trivia: Each celebrity who did a cameo was paid $10,000 for two days work (including The Turtles who sang the title song). If anyone was required to work for more than two days, they were to receive an extra $10,000. No one went overtime.
"Ed convinces his best friend Paul that he should fool around with other women in order to preserve his happy marriage. Ed illustrates his point with a series of vignettes acted out by a lot of famous celebrities. The joke of it all is that Paul is married to lovely Ruth! Written by alfiehitchie"