In Vegas, a blonde walks up to a Coke machine and puts in
a coin. Out pops a coke. The blonde looks amazed and runs
away to get some more coins. She returns and starts feeding
the machine madly, and of course the machine keeps popping
out the drinks.
Another person walks up behind the blonde and watches
her antics for a few minutes before stopping her and asking
if someone else could have a go.
The blonde spins around and shouts in her face: "Can't you
see I'm winning??"