Let me tell you a little story about buying mattresses.
So once, a few years back, my DH started complaining about our old mattress. Then he found a sale one new mattresses and worked to convince me to buy one. I finally conceded and we went shopping.
While we were buying the mattress, it occurred to me that DH was looking at Queen mattresses. "We don't have a queen bed," I commented. "Weeeelll...." he responded. Seems like after getting me to commit to a mattress he figured it would be easy to convince me to buy a new bed frame. After some wheedling, he convinced me.
We purchased the mattress and went to Ikea to look at bed frames. There was a particular frame I was fond of, so we bought it. As we were loading the disassembled bed frame pieces into our car it occurred to me that we would need to assemble the bed in our bedroom as it would not fit through our bedroom doors after assembly. In fact, we'd have to take everything out of our bedroom in order to have room to work. I mentioned to DH that this was probably the most sensible time to try and paint the bedroom (as we wouldn't want to move everything out and disassemble and reassemble the bed again in the future). He agreed, and we went to Home Depot to get paint.
So, after we moved all our furniture and started painting, I had another thought. I didn't own any Queen sized sheets! Back out to the stores to get 2 sheet sets that would fit our new bed and mattress.
And that's how DH convinced me to completely redecorate our bedroom and spend a heck of a lot of money....all because he wanted a new mattress.