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

"When visiting Naples, avoid wearing revealing clothing, especially when entering religious sites, as it is considered disrespectful. Refrain from speaking loudly or making excessive noise in public places, as Italians value their personal space and quiet. Do not assume everyone speaks English, and make an effort to learn a few basic Italian phrases. Avoid discussing sensitive topics such as politics, religion, or the mafia, as these can lead to heated debates. Do not expect punctuality, as Italians have a more relaxed attitude towards time. Avoid using the "OK" hand gesture, as it is considered offensive in Italy. When dining, do not ask for ketchup or other condiments, as it is seen as an insult to the chef. Also, do not order a cappuccino after a meal, as Italians typically only drink it in the morning. Finally, always greet people with a handshake or a kiss on both cheeks, as it is a common way to show respect and friendliness," mentioned another expat when asked about moving to Naples, Italy.