"Secretary Rumsfeld: There is an awful lot of misinformation out there. Diane, the reality is that you can get pregnant if you have sex in a hot tub. Are hot tubs fun? Yes. Do hot tubs make you want to have sex? You bet. But anybody who believes that you can't get pregnant is simply uninformed, misinformed, or poorly informed, and does not belong in a hot tub."
More of this at: Esquire:Humor:This Way Out:Sex Tips from Donald Rumsfeld
Thanks to (who else) Andrew Sullivan.