What to take care of in Bali? - Don’t Use Your Left Hand To Touch Or Give!
This precaution has to do with the left hand being used primarily for hygienic purposes. Balinese traditionally don’t use toilet paper, using water to wash up instead; the left hand “does the business” of washing up the nether regions.
Thus the left hand is somewhat polluted, and should never be used to touch other people or to hand something over. The exception is when you use both hands to hand something over to someone; this is considered a high compliment.
As “Western” and modern as much of Bali presents itself, the native culture of Bali provides a firm and tangible bedrock on which Balinese behavior and relationships are built. So if you’re going to visit Bali with a mind to visiting the island’s temples and meeting the local people, you’ll need to mind your manners to stay on good terms with the locals.