From the click through (http://www.ietf.org/rfc/rfc2324.txt http://www.ietf.org/rfc/rfc2324.txt): 2.1.4 WHEN method When coffee is poured, and milk is offered,

From the click through (http://www.ietf.org/rfc/rfc2324.txt http://www.ietf.org/rfc/rfc2324.txt): 2.1.4 WHEN method When coffee is poured, and milk is offered, it is necessary for the holder of the recipient of milk to say "when" at the time when sufficient milk has been introduced into the coffee. For this purpose, the "WHEN" method has been added to HTCPCP. Enough? Say WHEN.