In case your imagination needed any help: http://i.imgur.com/FGwqP.jpg
I was genuinely surprised that this wasn't once mentioned in the article especially given the title.
It's fairly well hidden, but it's there: "I received an email from a young woman who pointed out that the logo is clearly a schematic diagram of fellatio, with the Olympic rings being the curly hair of one party."
Once you have seen Lisa Simpson on her knees, to the right, satisfying a man on the left, you cannot 'unsee' it.