Bryce wants a cat but not the responsiblity

I went shopping this morning at Wal-Mart and out front there were a couple kids with some kittens they were trying to give away. I know how much Bryce likes his cats and they were pretty cute, so I called him to ask him if he wanted me to bring one home. Me: "Hey, there're some kids with kittens they're getting rid of....Should I look at bringin one home? They're pretty cute. Do you want a kitty?" Bryce: "(in a totally disinterested, unexcited voice) yeah? um, no." So, I did not bring home a kitty. When I get home... Bryce: "Where's the kitty?!" I told him I didn't bring him home a kitty since he didn't sound so interested in them, and if he was that interested in them we could go back and look. So, we ended up going back to Wal-Mart to see if they were still there 2 hrs later and they weren't. (It took us 2 hrs to go back because he was telling me I had to go by myself with out him and bring the cat back so it would be my cat and not his and I told him it had be a together thing.) Bryce told me that he didn't want to have it as his kitty because he doesn't want the responsibility of it, so if it claws stuff he could say "your stupid cat" because it would be mine since I brought it home. So, now I know if there are cute kittens, Bryce wants one but he won't tell me that. He also told me for future reference that he likes grey and black cats over calico or orange ones. :)  I'll be sure and keep that in mind.