Idiom:

Put your/our heads together ( work together )

Hit the book:
Texture
Scrap
Intimate
Infant
Persistent
Irrespective of
Novel
Hedonic

To find out, the researchers set up a series of experiments that would examine what people felt when they touched another's skin. They had them touch their own forearm and touch another person's forearm, and rate their softness. Sure enough, the participants regularly rated each other's skin as softer and smoother than their own.