Cow lines are farm humour at its gentlest — mooing, pastures, and being udderly smitten. The puns are so telegraphed that delivery is everything: the pause before "udderly" is where the laugh lives. County shows, petting farms and rural pubs are home turf.
They pair naturally with a countryside setting but survive the city as deliberately corny texts — the kind sent to make someone roll their eyes fondly.
Cow lines are comfort-food comedy: nobody is impressed, everybody smiles, and that is precisely the transaction. They suit relationships and flirtations that already run on daft texts — the deliberately terrible pun as a love language.
In the field, literally, they work at county shows, farm shops and rural weddings once the dancing starts. The farmer lines are the natural next page for the whole agricultural register, and the animal collection covers the rest of the barnyard.