It's ironic to note that this first episode was rated very poorly when it aired on prime-time TV in January, 1971 because hardly anybody watched. However, the few who saw this historical episode were rather shocked at what they heard: subject matter and language that were pretty much off-limits before this - especially on sitcoms.
In one scene, Archie & Edith walk in the house after leaving church early. They see Gloria & Mike holding each other and kissing provocatively in their journey to the bedroom. Mike sees Archie & Edith, and says "You're early!" Archie replies "So are YOU!"
A few minutes later, something was mentioned about the surprise anniversary party Gloria & Mike had planned for the Bunkers, and Archie (referring to Mike & Gloria's love-making) said "THEY were the ones having the surprise."
These comments were pretty risque at the time, considering that most sitcoms before this were squeaky-clean.