On: On Saying No - The Power of Simply Answering, "No."

[riffer]

Also, try using "fine" as a way of consenting to something rather than "yes"

It conveys the same certainty and closure as "no"

[DarrenMills → riffer]

I've personally taken a dislike to using two phrases with people, "fine" and "whatever". Both of them, generally, have a negative connotation to them. Especially when talking to a girlfriend/significant other, it just feels crude.

[trafficlight → DarrenMills]

This is very true. My wife particularly hates "fine" and "sure".