You know it's true.

"Young men behave according to an algebraic formula. When they're together, the quantity of restraint each possesses is inversely proportional to the number of men in the group. Just like Hugh-from-St.John's. He would have been a perfect gentleman had he traveled alone, but as he was with a male friend, his capacity for restraint was divided by half. Had he two more friends present, there would have been a belching contest or some such nonsense." - Spoken by the character Peggy Somerset in 'Catherine's Heart', a book by Lawana Blackwell that I recently read.