Alexander Comfort was a British scientist and physician known best for his nonfiction sex manual, The Joy of Sex. He was an author of both fiction and nonfiction, as well as a gerontologist, anarchist, pacifist, and conscientious objector. source
Since a month, two months ago, you know, I've started hitting the ball well. I'm playing some really good tennis. That really helps. I sort of have to motivate myself to get pumped up. It really helps my game a lot.