When Should You Stop Sleeping on Friends' Sofas?

The issue of "crashing" on a friend's sofa whether you’re visiting from out of town or as a spontaneous nightcap touches upon a lot of considerations, from financial and spatial to friend boundaries and responsible drinking. Is there ever an age when one should simply cease sofa sleepovers? To explore the matter, we posed that exact question (and more) to men and women of all ages—and the results were insightful and hilarious. As it turns out, there are hugely varying opinions, so click through to read 16 answers to the complicated question and let us know what you think!