Clarence Reid may be better known to you by his alternate persona & Stage name of Blowfly. Clarence was a songwriter for many hit soul acts in the 60's & 70's such as Betty Wright, Sam & Dave, Gwen McGrae and KC & The Sunshine band. As Blowfly, he has recorded numerous albums, mostly porno-matic sex spoofs of other songs as well as original raps themed around sex. His stage name originated from his grandmother, who overheard him as a child singing "Do the Twist" as "Suck My Dick", and said "You is nastier than a blowfly."
Clarence recorded a few hits of his own in the 60's including "Nobody But You Babe" under his real name and a Blowfly song called "Rap Dirty" in 1965. Many hip hop historians consider "Rap Dirty" as the first rap song because he talks in rhyme and it has then slang term for talk "rap" in the title.
My personal favourite of Clarence Reid's is this track I've loaded up for you "Masterpiece." Kenny Dope has recently release this on his Kay Dee records as a 7" edit & dope beats edit, but here it is in its original form as it was recorded in 1973? Date not printed on label.