Explanation
In Brazil, patting someone on the head is generally considered condescending or overly intimate, as the head is viewed as a personal and almost sacred space. This gesture is typically reserved for very close family members or romantic partners, and using it in a social gathering can be seen as disrespectful or infantilizing.
Local Tip
Instead of patting the head, offer a friendly handshake, a light touch on the shoulder, or a hug (abraço) if you know the person well.
How it compares elsewhere
The head is considered the most sacred part of the body; touching it is a major taboo.
Patting a child's head is often affectionate, but doing so to an adult can be seen as patronizing or disrespectful.
Patting an adult's head is usually reserved for close friends or family; in professional settings it can be perceived as condescending.