Decorations is a category of products a lot of buyers have positive associations with. It is indicated by the fact that often we tend to see them inter alia during Christmas or birthday parties.
The amount of people, who enjoy harmful emotions (which is believed to be a paradox) is quite close to zero. It is implied by the tendency that each of us wants to be happy, to have fun, to be pleased, appreciated etc. It is totally normal, which explains why no one is surprised with the in the top analyzed sentence.