A blonde is walking past a pasture
Being curious about various farm animals and seeing a farmer nearby she asks him
“How come those cows don’t have horns? I thought cows have horns.”
Farmer, happy to explain the situation to polite woman nods and says
“You see miss, we often remove horns from cows.
That way they don’t get into accidents, don’t hurt each other, don’t get tangled into branches or fences or similar.
We do that by either sawing them off of putting a drop of acid on the horns when they are still young so they don’t grow.
But those particular cows don’t have horns because they are horses.”