The Robot Flock

The parish priest was tired of giving sermons every week, so he built a robot to deliver his sermons.
The worshipers were tired of listening to the priest’s sermons, so they built robots to listen to the sermons.
Robots delivering sermons to robots, week in and week out.
After the nuclear war, all the humans were dead.
But the robots kept going to the services, and the priest robot kept delivering them.
Nobody knows what the robots do the rest of the time.
Because all the humans died.
Maybe they write silly stories, and you listener robots listen to them?