Derico: One German: a mug of beer
Two Germans: an army
Three Germans: a world war
Now, now... 50 years, 80 millions of us and still no new world war... It doesn´t seem to work that way any more...
How about this version:
One German: a mug of beer
Two Germans: an autobahn speed duel
Three Germans: a peace demonstration / strike for a third month of vacation