Yes. All that hair. I recall it came into vogue at around the time of the Munich Olympics, which would be 1972. The men's hair salon I went to at that time in Toronto - that now long-chopped long ago era when I still had hair worth reckoning with - immediately put up its prices by 50%-100%, and according to my hair cutter the cash rolled in.
It looks rather, well, unnatural now. But it was THE fashionista look in 1973 when I left Toronto for New Mexico. In Santa Fe I soon got rid of my flared jeans and had my locks shorn to the popular NM short cut. Real men in Santa Fe and Taos didn't go out looking like a male model in the '70s.
These days many of us would be happy to half half as much hair. And black not out of a dye bottle.