in an otherwise useless article, this nice observation:

Among other things, this line of inquiry has led Loewenstein to collaborate with health experts looking into why people engage in unprotected sex when they would never agree to do so in moments of cool calculation. Data from tests in which volunteers are asked how they would behave in various ''heat of the moment'' situations -- whether they would have sex with a minor, for instance, or act forcefully with a partner who asks them to stop -- have consistently shown that different states of arousal can alter answers by astonishing margins. ''These kinds of states have the ability to change us so profoundly that we're more different from ourselves in different states than we are from another person,'' Loewenstein says. [more>]