I'm Not Great With Percentages, But....

One of my FAVORITE things about working on a college campus is watching all the relationship moments playing out in front of me. Like yesterday.... there was a couple walking across campus in front of me and the guy was coughing up junk and it sounded really disgusting.  He said, "I hate when I have all this snot coming down into my throat and out my nose....it is so gross.....(then, to the girl) except, when it happens to you....it looks great on you!"  I did laugh out loud behind them....quietly.....I am 99% sure my laugh was quiet enough that they didn't hear me....

And I am 100% sure that he would like to date her :)

Then, there's my marriage....Brad says, "Are you sure there are absolutely no germs left on you from your head cold?" (which I had recovered from about a week ago :)....."I am not smoochin' you until you are 100% sure"  :P

So I just wanna ask....how do you prove something like that?  

AND, isn't it the Lysol or Clorox commercial that says you can only ever get rid of 99% of the germs?  You know the one where they show a counter top getting wiped off and there is still this one, little green, wormy-looking thing on it.