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

"In Tiong Bahru, it is considered rude to point with your foot as feet are considered the lowest and dirtiest part of the body. Avoid chewing gum in public as it is banned in Singapore. Do not litter, as Singapore is known for its cleanliness and strict laws against littering. Avoid discussing politics and religion openly, as these topics can be sensitive. When visiting temples or other religious sites, dress modestly and respect the customs. Do not touch someone's head as it is considered sacred. Always use your right hand for giving and receiving, as the left hand is considered unclean. Avoid public displays of affection as it is considered inappropriate. Always wait for locals to initiate a handshake, as some may prefer not to have physical contact. Lastly, tipping is not customary in Singapore, so do not feel obligated to leave a tip after a meal or taxi ride," mentioned another expat when asked about moving to Tiong Bahru, Singapore.