While it might seem unusual, a calf attempting to suckle on a person (a "calf sucking man on farm") is usually a sign of a calf that is looking for a substitute mother. This can occur in several ways:

So the next time you hear that odd phrase, remember: it’s just a calf being a calf, and a farmer being a farmer. With the right techniques, both can coexist without the sucking getting out of hand. And if you ever find yourself with a calf latched onto your arm, take a deep breath, smile, and reach for that bitter spray. You’ll both be better for it.

Animals learn through positive reinforcement. If a farm worker routinely delivers warm milk or milk replacer, the calf quickly associates the human presence with food. When the worker enters the pen, the calf approaches and attempts to suckle the handler's fingers or clothing as an extension of the feeding process. 3. Exploration and Sensory Mapping

: Tasting lactose (found in milk) triggers a sucking reflex that lasts for about 10–20 minutes the meal is gone. The Speed Problem