Are you wondering why your friends are turning into giraffes one by one?

You logged in to Facebook and then saw that your friends are turning their profile pictures into giraffes. This is because a new game is taking over the social media site. The game involves answering a riddle and if the answer is wrong, the user should turn his/her default photo into a giraffe for the next 3 days.

The viral quiz gained attention last Saturday and garnered various reactions from online users. Some said that this is very childish and stupid since one can check the answer on Google. Others said that it is fun to join such games once in a while.

This is not the first time that changing profile pictures went viral. In late 2010, changing profile pictures into a favourite cartoon character became a hit. It was later known that this was a protest to support children.

Changing the profile picture in Facebook has been an unspoken tradition to show support to someone or a certain cause. Sometimes it is also a way to a user's opinion on a particular issue or matters of concern. This is referred to as pictivism. Changing your profile picture can impact and influence friends and followers. After all, a profile picture is similar to the topfold of a newspaper where the banner headline is placed.

This viral giraffe challenge is far from previous causes. It seemed this was just another thing users can do in Facebook, and bored netizens are taking on the challenge. The riddle goes: "3:00 am, the doorbell rings and you wake up. Unexpected visitors. It's your parents and they are there for breakfast. You have strawberry jam, honey, wine, bread and cheese. What is the first thing you open?"

What is the answer to the riddle? Here's a hint on how to get the right answer. Think of the riddle happening in real life.