Nibbler - I have to fight to bring new orchids into my house too. I recently told my husband that I needed a hobby that wasn't taking care of him (or anything to do with him)
I have also started having orchids delivered to my work. He always asks when I bring them home where they came from. I just tell him they are work orchids and not to worry.
I think I'll have to try the "I bought them to kill them" excuse since I can't seem to grow anything other then orchids sucessfully. He'd believe that one.