It's a fairly safe hobby for me. My boy is into cars, and believe me... my hobby is MUCH CHEAPER than his. My "parts" (as in e/s and l/s haha) cost 15-45$ each... his costs in the hundreds/thousands. Believe me, there are much more dangerous (to the wallet) hobbies out there!
For this reason, he also can't hassle me about how much I spend on make-up! Or clothes, shoes, purses, etc... hehe.
Also, my stash is for personal use.