Ever wondered why it feels so satisfying to keep clicking the Send/Receive button in Outlook, even if you just clicked it, or if you know you don’t have an internet connection?
This excellent blog post explains the psychology behind all this:
http://www.mindhacks.com/blog/2006/09/why_email_is_addicti.html
(via http://blog.clearcontext.com/2006/09/pavlovs_email.html)
Tatham Oddie 