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

"When visiting Saipan, it is important to respect local traditions. Customs vary across different islands and cultures, so one should be mindful to not make assumptions and take the time to learn some of the local customs. Avoid using your feet to point at or touch another person or sacred objects. Refrain from public displays of affection outside of the home. When visiting religious sites or places of history or cultural significance, it is important to dress modestly and to keep your voice low. It is also considered rude to take photographs of locals without asking for permission. Lastly, be aware that chewing betel nut is a cultural custom in Saipan and it is important to not criticize or make fun of it," remarked another expat in Saipan, United States.