Another great answer from Wilt. For those of you on your high horse that make this sound like infidelity or something, these are fun little stories of people spending discretionary money of their own. If you have to explain every penny spent to your significant other, than there is a lack of trust there to begin with.
Not like these funds are dire funds for family living. I happen to buy my gear from a) funds from selling of prints or b) funds from sale of my hockey tickets. If others were spending rent money on their gear, then there are issues there.