I think these jokes are immature and asinine.
And so is your mom.
Just kidding.
Even though I have heard a story, which has happened in real life in my country, where some boys were playing football or something, and they were being so loud that a woman, who was living close there, opened the window of her house and complained to them about them being too loud.
Then one of the boys yelled "Shut up, you old whore."
She replied with "Speaking of old whores, how is your mom doing?"
And I find that story funny.