That's a common comment but actually isn't true. Some great movies have fantastic Peetimes. Take for instance Captain America: Winter Soldier. (Lets not debate how good the movie was. I think it was at the very least a well told story.)

At any rate it has a fantastic Peetime. There's an entire 4+ minute span of Steve and Natasha entering the old Army base where Shield began. There's almost no dialog, it's just them searching as the tension builds. As a story telling device it's an important scene - building the tension. But if you need to take care of some urgent biological needs this makes a perfect time to run and pee. :-)

Not necessarily - the non-pee-time bits might be barely non-peeable, or absolute 'do not pee, even if you're about to wet yourself' moments :-)

Jack Warner got there first, basically: http://articles.latimes.com/1990-06-10/entertainment/ca-378_...