A man goes to a whorehouse, and says to the receptionist "I want to fuck a blonde with big titties!"
The receptionist replies "Take the elevator to the first floor, room one"
The man takes the elevator up and comes back down half an hour later and says "That was awesome!  Now I want to fuck a brunette with even bigger titties!"
The receptionist replies "Take the elevator to the second floor, room two"
The man takes the elevator up and comes back down an hour later and says "That was even better than the first one!  Now I want to fuck a redhead with enormous titties!"
The receptionist replies "Take the elevator to the third floor, room three"
The man takes the elevator up and comes back down two hours later and says "That was the very best one of my life!  Now I want to fuck a blonde with gigantic titties!, should I just go up to the fourth floor?"
The receptionist replies "No! Don't go up the the fourth floor, it is all dark up there.  Go back to the first floor and go to room three"
The man goes to the elevator again and thinks to himself "Screw that, every higher floor was better than the last one.  I am going up to the fourth floor!"
So he takes the elevator up to the fourth floor and sure enough, it was all dark up there and he couldn't see.  So he felt his way around for a while until he felt something hairy with a hole in it.  Then he started fucking away.
Four and a half hours later he goes back down to the receptionist and says "That last one was the very best one I have ever had in my entire life!  How the hell do you even get women like that?  That last one can never be topped!"  Then the man left to go home.
Five minutes later, the elevator comes down from the fourth floor, a very irate midget janitor with a beard runs out of the elevator yelling "WHAT THE FUCK!" while spitting all over the floor.