something about "desensitization".
http://en.wikipedia.org/wiki/Desensitization_(psychology)
[video=youtube;bsp89c_XKkg]http://www.youtube.com/watch?v=bsp89c_XKkg[/video]
http://en.wikipedia.org/wiki/Desensitization_(psychology)
[video=youtube;bsp89c_XKkg]http://www.youtube.com/watch?v=bsp89c_XKkg[/video]