Wife Acceptance Factor means getting the wife's approval of a purchase made by the husband.

It mainly refers to electronics such as TVs.

http://en.wikipedia.org/wiki/Wife_acceptance_factor

Wives control 88% of electronics purchases indirectly ... or directly

This CNET article tells us:

WAF is one of those dirty little secrets of the electronics world ... now integrated into the DNA of so many products

This boston.com article tells us:

WAF is so powerful that it is rapidly changing the nature, design, and even the color of electronics and other consumer goods.

Consumer products seem more disgusting to me as time goes on. I think this is why. They are now mostly made to a female taste.

Check out Greg Grizzle. The man whose wife forced him to have a vasectomy if he wanted a motorcycle. That's a different take on WAF, more of pure power trip.

Advice for husbands wanting to buy stuff, from that article:

Stark also recommends addressing the relationship first, lots of "I love yous" never hurt, before proposing a significant purchase.

I cannot see why a man wants to put himself in this position