“A stressed-out and traumatized father can leave scars in his children. New research suggests this happens because sperm ‘learn’ paternal experiences via a mysterious mode of intercellular communication in which small blebs break off one cell and fuse with another.” How Dad’s Stresses Get Passed Along to Offspring. “Mouse studies show tiny intercellular pods convey to sperm a legacy of a father’s hard knocks in life.” (I’m not sure what this means for my kids. I’m stressed as hell, but my sperm are carefree and generally enthused.)