Here are some things to consider:
* Individual Personality: Some dogs are naturally more affectionate and enjoy being touched all over. Others are more sensitive and prefer less physical contact.
* Past Experiences: A dog who has been abused or neglected may be hesitant to let you touch their stomach.
* Body Language: Pay attention to the dog's body language. If they are relaxed with their tail wagging and their body loose, they are likely enjoying the attention. If they tense up, lick their lips, or yawn excessively, they may not be comfortable.
* Start Slow: If you're unsure, start by petting the dog on their back or chest and gradually work your way down. Watch their reaction and stop if they show any signs of discomfort.
Remember, always respect the dog's boundaries and stop petting them if they show any signs of being uncomfortable. If you're unsure, ask the dog's owner for guidance.