FYI, long hair was normal for males of all ages at various times in history. And if they chose not to grow their hair long, they wore wigs to make it seem as though they had long hair.And why did we boys have long hair ?
Some men actually look better with long hair as opposed to short hair.
That said, my first reaction every time I watched the opening credits for MacGuyver was "Richard Dean Anderson really needs to get a haircut."