Two for the price of one for you today, from the album of the same name by Larry Williams and Johnny Watson (later Johnny "Guitar" Watson - the album came out in 1967 before he picked up his guitar).
I'm not sure whether the former rocker and future funker came together by natural or artificial means, but either way it works. The album is a fine example of the classic male duo soul sound of the era.
"Two For The Price Of One" - Larry Williams & Johnny Watson
"Mercy Mercy Mercy" - Larry Williams & Johnny Watson