The hotness scale is really more of opinion rather than anything; sure they can be concrete factors such as bust size, hair color, etc; but how one determines these factors is solely on the views of the rater.
And personally, talking about procrastination with other guys isn't something I do on a regular basis; but if they start discussing research then I'll chip in a statement or two.
When we go to the mall my girlfriend always comments on the hot girls she sees and I talk about the guys. It's quite fun, especially when people overhear us and go "wtf?".
I like that; next time I get a girlfriend I'm gonna try that.