Friends husband keeps saying he is going to eat our guinea pigs!

One of my friends husband keeps saying he is going to eat my kids guinea pigs.

Now mind you I know he is kidding, sort of. He also talks about how he has eaten skunk and other small rodent type of animals. And claims to have had guinea pig before. I know that in some places in this world they do eat them, but does he have to keep talking about it?

I have asked him to stop especially in front of my kids. They know he is joking but I think they find it a bit immature for him to keep saying it over and over. And I guess I would agree with them.

After telling him to stop this joking he still hasn't. What should I do or do I just ignore it and let him realize no one cares anymore. (Well, we care but try to ignore)