Putting/carrying lead pellets in my mouth in the 1960s definitely caused my dementia, forgetfulness, crankiness, and generally anti-social demeanor; even though I stopped putting lead in my mouth when it became common-knowledge it can have long-term health risks. By then I was putting things in my mouth that have short AND long-term health risks... but I'm sure my 'issues' are lead related!
Some say that is symptoms of being married.