Who sang Crimson and Clover?

A lot of people feel that it is a reference to Sex and Drugs. Crimson being sex, clover being weed or some other sort of drug.. Buttt....

When asked himself, the songwriter and artist, Tommy James said that it was because Crimson was his favorite color and clover was his favorite flower. That it sounded so poetic when combined that he just had to write a song using that phrase.