Check this study out:

The misattribution of arousal study tested the two-factor theory of emotion. This theory has helped support Schachter & Singer’s concept of the two-factor theory. Psychologists Donald G. Dutton and Arthur P. Aron wanted to use a natural setting that would induce physiological arousal. In this experiment, they had male participants walk across two different styles of bridges. One bridge was a very scary (arousing) suspension bridge, which was very narrow and suspended above a deep ravine. The second bridge was much safer and more stable than the first.

At the end of each bridge an attractive female experimenter met the participants. She gave the participants a survey to fill out and a number to call if they had any other further questions. The idea of this study was to find which group of males were more likely to call the female experimenter. The results found that the men who walked across the scary bridge were most likely to call the woman, asking for a date.[3] This was most likely due to the arousal they felt from walking across the scary bridge. They had misattributed their arousal from the bridge towards the woman, making her seem more attractive. Strangely, when asking the males why they called the woman they all had reasons for why they called her. Some said it was because of her attractive face, body, and eyes. Yet, none of the participants attributed their feelings to the bridge causing arousal, therefore causing the experimenter to become more attractive.

(http://www.autoadmit.com/thread.php?thread_id=2740898&forum_id=2#26811890)

http://en.wikipedia.org/wiki/Hedonic_treadmill

(http://www.autoadmit.com/thread.php?thread_id=2740898&forum_id=2#26812593)