A collector of aromas would surely have in his cupboard several bottles with those scents that remind him of his happy moments, to somehow relive them by just sniffing a little of each bottle.
His favorite food, the smell of the grass after a soccer game, the rain that falls in the backyard of a childhood home, the aroma of the place where he had his first kiss.
But among them all, I think one that will inevitably be his favorite, is the smell of his mother, but not the perfume she used, but that particular body odor with which babies recognize their mother.