Do-dogs-sense-whether-someone-is-a-dog-person
Dogs are quite intuitive creatures and can pick up on subtle cues and energy from people. While they might not specifically sense whether someone is a "dog person" in the way humans might conceptualize it, they can certainly detect whether someone is comfortable or familiar with dogs based on their body language, tone of voice, and overall demeanor.
If a person is relaxed, open, and displays positive body language around dogs, they're more likely to make a favorable impression on the dog. Conversely, if someone is tense, nervous, or displays fearful behavior, a dog might pick up on that and respond accordingly.
So, while dogs might not categorize people as "dog persons" per se, they can certainly discern whether someone is friendly and at ease around them, which influences their behavior and interaction with that person.