BW
From Voyeurweb's Wiki about Sex
1: contributor: Despite the ongoing debate, the B in BW does not stand for Booty-licious, Beautiful, or Breath-taking, it stands for Brazilian. The W of course is for Wife. BW is not only gorgeous, she is also a real fire-cracker, a great traveling companion, and a super (sexy) friend.
BW's hubby-photographer is BWH.

2: Abbreviation for Black and White photo.