$ grep -l love guitar/* guitar/50-Ways.crd guitar/American-Pie.pro guitar/At-17.pro guitar/Best-Of-My-Love.crd guitar/Boxer.tab $
Boxer? Love? Oops, that's glove. Not only that, I missed the case variants of that. Besides, love's too mooshy. I want all the songs with 'romance' and 'candles' in the lyrics. This is a job for perl:
$ perl -n0e 'print($ARGV,"\n") if (/\Wlove\W/i and /\Wwife\W/i and \ /\Wmoon/i)' guitar/* guitar/space-oddity $
Hmm. Not exactly the kind of song I was looking for.