Can anyone explain this joke?

It's from the Prairie Home Companion joke collection, so I'm sure it isn't FUNNY, but no one I know seems to understand it, period.

"At a Sunday evening service, the minister asked if anyone had any announcements they would like to make. When no one said anything, an old Norwegian bachelor farmer raised his hand and said I'd like to announce I've got some baby pigs for sale."

Is a church joke? A pig joke? A Norwegian joke? A bachelor joke? A farmer joke? WHAT IS THE JOKE???


Thank you for your help.

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