Wife Approval Factor - very hard for male-types to predict and plan for. Typically demonstrated when said male brings a new pair of speakers, subwoofers, etc. home as a result of a great "score". The level of excitement can be severely limited or even destroyed by a low WAF. Conversely, this level of excitement can be exponentially increased by receiving a high WAF.
Ah ha! Thanks B-Man
So then the opposite would be HAF for the Husband Approval Factor