" A tradition or societal custom of bowing to one another when meeting, or tipping the hat as gentlemen used to, can be changed. But it is not a morally problematic custom. Customs may come and go through time and the different cultures in a country, city, or state. Still, Christians are called by the Church to look beyond this and discern if whether it pushes the boundaries of Christian morality or is just a harmless custom. "

― , Catholic Modesty: What It Is, What It Isn't, and Why It's Still Important