Like the age-old "*whine* Nothing I have matches!"
I say "Everything I've got is black, white, grey or OD green. Seriously, I can't help you, I'll never have the problem!"
I used that one for some time, then she caught me and got me back one day when I complained bitterly that I didn't have proper clothes for a job interview.
"Gee, hon, I've never HAD that problem!"

My outfit that day ended up being 3/4 hers that day! SWMBO 1, Kitsu 0