> when you spend money on goods and services that you know represent conspicuous consumption, and on ones that represent luxury, and provide little practical utility, how does it make you feel?

To be entirely honest, I don't really do this. I guy goods and services if they are fun or stimulating, make my life easier for me, or solve a problem that I have.

I can't remember ever buying something because it was luxurious, except for the occasional meal. If I did, then I think I'd feel like I was wasting my money.