ORGASMS could give our brains a better workout than doing Sudoku.
The sensation increases brain activity across the whole organ, whereas a puzzle activates only localised regions, said Professor Barry Komis-aruk (72), of Rutgers University in New Jersey, US.
He also said the sensation of sexual climax blocks pain.
"At orgasm we see a tremendous increase in the blood flow [to the brain]. So my belief is it can't be bad.
"Mental exercises increase brain activity but only in relatively localised regions. Orgasm activates the whole."
He came to his conclusions after studying women at the university's Department of Psychology. He has been studying female sexual pleasure since the 1960s.
He still believes there is much to learn about sexual climax: "We know virtually nothing about pleasure. It's important to understand how the brain produces it."