On this day in music history: June 9, 1973 – “One Of A Kind (Love Affair)” by The Spinners hits #1 on the Billboard R&B singles chart for 4 weeks, also peaking at #11 on the Hot 100 on June 30, 1973. Written by Joseph B. Jefferson, it is the third consecutive R&B chart topper single for the vocal quintet from Detroit, MI. Songwriter Joseph B. Jefferson is inspired to write the song after his live in girlfriend suddenly leaves him. She writes a note to him on the kitchen wall that says simply, “I’m in love with you. I can’t stay with you.” Also a staff writer at Mighty Three Music, the publishing company owned jointly by producer Thom Bell and Philadelphia International Records owners Kenny Gamble and Leon Huff, Bell while looking for material for The Spinners to record, asks Jefferson if he has any songs. He replies “yes” and say that the song is titled “One Of A Kind (Love Affair)”, even though in truth he had not actually written the song yet. When the two meet again a week later, Jefferson has written the chorus and two verses, and plays it for Bell. When the producer exclaims that “it’s a number one record!”, the songwriter goes back and completes the song. Recorded at Sigma Sound Studios in Philadelphia, the track features MFSB providing musical backing, with Spinners members Bobbie Smith and Philippe Wynne sharing co-lead vocals on the song. On the full length LP version of “One Of A Kind”, Wynne improvises the line “makes you want to love her, you just got to f*** her” at the 2:40 mark in the song. The line with the expletive is edited out of the single version, though radio stations that are unaware of the line, often play it off of the album without listeners noticing it either. Issued as the third single from the group’s self-titled debut album for Atlantic Records, it becomes The Spinners’ third million seller in a row. “One Of A Kind (Love Affair)” is certified Gold in the US by the RIAA.