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

"It is important to be respectful of the local culture when visiting Vientiane. It is important to dress modestly and to avoid public displays of affection. It is also important to be aware of the local customs and to be respectful of religious sites and ceremonies. It is also important to be aware of the local language and to avoid speaking loudly or using offensive language. Additionally, it is important to be aware of the local food customs and to avoid eating with your hands or pointing with your feet. Finally, it is important to be aware of the local customs regarding gifts and to avoid giving gifts that are too expensive or extravagant," said another expat in Vientiane, Laos.