Why is it?

Why is it when you are so cold and you have enough layers of clothes to rival the Michelin Man that you need to go to the loo!!
Why is it that the queue next to you always moves faster than the one you're in, even though there's one person in front of you and 20 at the next one!
Why is it that most of the small town men (in this one anyway, with the exception of a certain vet) are genetically challenged, make no useful contribution to the human gene pool at all, but insist on asking you out smelling like something that the cow vomited all over!
Why is it that the boss can never remember your birthday, but remembers each and every little mistake you made and takes great glee in reminding you of it in front of a host of people!

Sometimes life is not simple - why?