At 12 weeks, why is my puppy humping and how can I address this behavior?

At 12 weeks old, your puppy may be humping due to natural instincts, playfulness, or excitement. To address this behavior, you can redirect your puppy's attention with toys or training, provide regular exercise, and consider spaying or neutering as they get older to help reduce humping behavior. Consistency and positive reinforcement in training are key to addressing this behavior.