Don't take the title of John Mayer's Heavier Things literally. Mayer offers nothing heavy on the follow-up to his breakthrough hit, Room for Squares — nothing heavy in the music and nothing heavy in the lyrics. No, Mayer is smooth, slick, and streamlined on his second or third album (it all depends if you count his 1999 debut, Inside Wants Out, half of which was re-recorded for Room for Squares, which itself was released in two different incarnations), playing things straight and following the blueprint his big radio hit, "Your Body Is a Wonderland," provided. The title Heavier Things does reflect his new directness, lacking the lithe playfulness that resulted in a Hank Mobley joke, of all things, for an album title last time out. That extends to the rest of the album — the humor and interesting wordplay have been toned down, leaving very little ambiguity.