I think the crop this year will be excellent. The editor proceeded to his office and irritated at his wife's remark, sat down and wrote a short piece about how great the corn crop would be this year. That night when he returned home he found his wife waiting for him with a sheepish grin on her face, a copy of the editor's evening paper in her hand. I was wrong. It says right here in the paper that the corn will be excellent this year.
Hair length is genetically determined and varies from person to person.
Head hair, on the other hand, can grow for years and years before sliding down your shower drain. That's not to say that all your head hair is constantly growing. At any given moment only 80 to 85 percent is growing, while the rest waits patiently to fall out.