acknowledgments -- introduction -- innies and outies aren't just belly buttons -- when opposites attract -- are you an innie or an outie? -- all brains aren't the same -- innie and outie hardwiring -- couple combinations -- play the music and dance -- becoming bilingual -- speaking innie and outie -- to go or not to go? -- that is the question -- pillow talk: -- uncovering intimacy -- regaining balance & recharging -- boosting batteries -- the more things change . . . -- adjusting to life -- sticky wickets -- when worlds collide -- harnessing your strengths -- team up when stepping out -- references.