Wigs.

 

Joseph lost all his hair and so joined the bald heads society.

He met Natasha who was also bald.

They fell in love so deeply their hair began to grow back and they were kicked out of the bald heads society.

The more they loved one another, the longer their hair grew. It grew so long it covered the whole earth.

So, the governments of the world ordered them to cut it all off and they were bald again.

But it kept growing back and covering the earth, so they were killed and the remains of their hair were used to make wigs.