1. Sensitive area: The palm of a male's hand is a relatively sensitive area, and scratching this area may cause discomfort or itching, leading them to involuntarily retract their hands or develop defensive reactions.
2. Social etiquette: In most cultures and social situations, touching or scratching someone's body parts without permission is considered impolite or a violation of personal space. This may make the other party feel embarrassed or unhappy.
3. Misunderstandings and conflicts: Due to the sensitivity of the palm, scratching this area may be misunderstood as a provocation or provocative joke, especially in unfamiliar or tense relationships, which may lead to unnecessary misunderstandings and conflicts.