I just have to share my stupid head canon with someone or i'll die. Sam probably buys a shit ton of scented candles and Dean makes fun of him for it but ends up stealing his favorite ones for himself anyways. Also Sam probably found one that reminded him of Cas and bought it knowing Dean would take it.
Sam would buy candles, that’s true. He is the one constantly restocking their ritual supplies after all. But he’d buy the basic scents; he doesn’t like complicated, he just likes clean. Pine and vanilla and eucalyptus. I think Dean would get frustrated by the plainness of it. If the bunker’s going to smell like something, why not make it something exciting? and buy his own eventually. Begrudgingly. In secret. Apple spices and floral woods and citruses… “Guava Coconut Fusion.” He’d get very particular about it without Sam ever even knowing.
And then one day he totally breaks down because