In the South, and maybe other places as well, the pineapple is considered a sign of hospitality. It supposedly began with a tradition begun by ship's captains. When they would return home from the sea they would spear a pineapple and place it in front of their house by the gate, signifying that they were home, safe from the recent voyage, and that there was food and drink inside for all who would like to come in and visit.

SRH

May God bless America and those who defend her.