Men are nothing but trouble:

A 109-year-old woman in Scotland said in January that the secret to her longevity is this: Eat your porridge and avoid men. Centenarian Jessie Gallan, who never married, was born in a tiny two-room farm cottage where she slept "top-to-tail" with her five sisters and a brother on a straw mattress, reported The Daily Mail.

Gallan told the newspaper that her "secret to a long life has been staying away from men. They're just more trouble than they're worth." She noted that she also "made sure that I got plenty of exercise, eat a nice warm bowl of porridge every morning and have never gotten married."

Last year when she turned 108, she credited her porridge -- but not avoiding men -- as the reason for her longevity.

The oldest person in the world is currently Susannah Mushatt Jones, who turned 116 over the summer. She claims that eating bacon is the secret to long life.

Last year, a national survey of centenarians in the United States found that the secrets to long life include plenty of time with friends and family and a commitment to fitness.

UPDATE: Gallan died in a nursing home in March 2015.