1) Commissioned like this on purpose because having a giant dick in your logo projects strength, virility and improves buisness
2) Artists hired to come up with the logo were having a bit of fun with management like those hidden frames we're told are in disney movies
3) Completely by accident.
Frankly, for some of those images I can't imagine that it could possibly be 3). You would have to be blind and stupid to not see the relationship. I mean gads. Look at the farging icon of the winner. Holy crap. You might as well call it Buttfuck University.