What cultural faux pas should I try to avoid making in Can Tho?

"When visiting Can Tho, it's important to respect local customs and traditions to avoid any cultural faux pas. Never touch someone's head, as it is considered the highest part of the body and touching it is seen as disrespectful. Avoid showing too much skin, especially in religious or sacred places, as Vietnamese culture is quite conservative. Public displays of affection are generally frowned upon, especially between members of the opposite sex. It's also considered rude to point with your finger, instead use your whole hand to gesture. When visiting someone's home, always remove your shoes before entering as a sign of respect. It's also customary to bring a small gift for the host. Avoid discussing sensitive topics such as politics, the Vietnam War, and criticism of the government. These topics are considered taboo and can lead to uncomfortable situations. When eating, never stick your chopsticks upright in a bowl of rice, as this is associated with death and is considered extremely disrespectful. Lastly, always treat elders with the utmost respect. In Vietnamese culture, age is highly respected and elders are often served first at meals and given the most comfortable seats," remarked another expat in Can Tho, Vietnam.