I really enjoy barbershop music or what some people call rap!  Do you enjoy it?
I sure do I just love it so much, I use to sing barbershop music back in the day, is there anything you'd like to know about it? 
That's awesome!  When did it originate and where?
Well most of it originated in the early 1930s as a style of a cappella close harmony, It was characterized by consonant four-part chords for every melody note in a mostly homophonic texture.