The following expressions share an unusual quality. Can you determine what it is?

ADAM & EVE

ROOM & BOARD

MIX & MATCH

SWEET & LOW

ROD & REEL

BLACK & BLUE

PEACE & QUIET

HINT:

It has to do with initial letters.

Answer:

The initial letters of the two words, separated by "&", stand for something completely different than the original expression:

A&E ........ Cable TV network (Arts & Entertainment)

R&B ........ Rhythm & Blues

M&M ...... The candy treat

S&L ........ Savings & Loan

R&R ....... Rest & Recuperation

B&B ....... Bed & Breakfast

P's & Q's ..... As in "Mind your P's and Q's" (Mind your manners)

Credit: NY Times Crossword - Mar. 18, 2007

Craig Kasper - INITIAL SUBSTITUTIONS