Call it dad brain.
Studies show that becoming a father changes men’s brains in ways that help them tackle the complex tasks of being a parent, leading neuroscientists say.
– The Washington Times – Saturday, June 15, 2019
Emotions such as heightened arousal can make pupils dilate. Belladonna (or deadly nightshade) was once used by women to dilate their pupils, thus making them seemingly more attractive.
Source: Wade, N. J. & Swanston, M. T. (2013), Visual Perception. An Introduction. 3rd edition, London, Taylor and Francis Group.
