"What I Say" - White sex cleaner than black sex?

When Ray Charles needed another few minutes of material to fill his set one night, he improvised what would later became the hit, "What I Say." Due to the sexually suggestive nature of the song, after it was recorded, it was originally banned by several radio stations. Though when it was covered by white artists, the song was allowed to air. Why do you think this occurred? Can you think of any other songs by African American artists at this time period that were not allowed to air, but received radio play when covered by white artists? Do you think this encouraged black musicians to keep their songs clean at this time in order to obtain the exposure and royalties provided by radio play? Do you think that the music created at this time by artists such as Ray Charles was so heartfelt and important to them that they wouldn't alter their songs for anything, even if it meant less radio time, and ultimately less money in their pocket?