Baby Workout by Mr. Excitement aka Jackie Wilson from the album of the same name is about Wilson urging a girl to dance or work out all night long with him.
This R&B classic subtly use the double entendre workout to talk about more than dancing all night long. This was when songs had lyrics and didn’t have to be expletives to be naughty. The song was Wilson’s biggest hit of his singles that charted on both the Billboard Hot 100 and the Hot R&B/Hip Hop Songs.
Jackie Wilson Baby Workout (Shindig 1965)