The researchers hypothesize that our experiences with touch early in our development provides a scaffold for the development of conceptual knowledge. In adult life, these same touch experiences activate the scaffold in the same way, and lead to unconscious influences on our attitudes and decision making. The experience of weight gets metaphorically associated with seriousness and importance. Idioms like “that’s heavy” reflect this association. Similarly, rough textures get associated with difficulty, and we say “having a rough day.”