It seems that Sponge Bob is a real trend setter;
pineapples are turning up everywhere these days!
Their logo is even a pineapple!
and the Pièce de résistance ...
"Now that I live in the south, I've picked up on some funny etiquette customs. Did you know that people used to put a pineapple on their mantles for a party? The pineapple is a symbol of welcoming. Thus, when the hosts were ready for everyone to get the heck out of their house, instead of yawning loudly, they would simply remove the pineapple from the mantle and all of the guests would know it was time to vamoose!"