I want what I want and I can't help it

I'm a very simple person and I'm also a person who is very thankful to have what I have in life. But lately there has been something that I've really wanted to purchase, one of those things in life that is a want more than a need. After seeing commercial after commercial on television for them I've been looking at hot tubs. I have the perfect place for one on my back porch, and with as badly as my back has been hurting lately, I know that I could easily justify the purchase. But now it's just a matter of convincing my husband that it's something I need rather than something that I want...LOL!