Taboo - Actions or words that may be considered inappropriate and/or offensive to other cultures
Examples
Asia - Don't open gifts in front of a recipient
Venezuela-Always take a gift when visiting a home
Canada-White lilies represent death
South Korea-Offer a gift with both hands and do not open a gift in front of a giver
Japan-Avoid red Christmas cards as red is associated with death
Morocco-a host will be obliged to give you whatever you complement in his home
Orthodox Jews-do not give baby showers before a child is born because it is believed that pregnancy is a time of danger and problems and they do not want to tempt fate
Netherlands-Do not give food as a gift
Austria-even number of flowers is considered bad luck
Thailand-ripping the wrapping paper when opening a gift is considered rude