why would a client tell you where their money comes from? if they have spare money to use, money is money eh?

I think regardless of where the income is coming from, people should feel able to commission others, a little luxury now n again y'know? Of course I'm not one to judge what people do with their money, I only worry when it seems to be the only thing they use said money on (just overall 'hey make sure you get food and necesseties too, my porn isnt gonna pay your bills')