what happens on tour stays on tour

English

Originally referring to sporting or band tours.

When a group of people, usually a group of all-male close friends, get together and travel, go on vacation, throw a party, etc., any controversial conduct engaged in during the event must be kept strictly confidential.
- 2010, Dannii Minogue, Dannii: My Story‎, Simon and Schuster, →ISBN:
  To be honest, I can't really commit to paper half the stuff that went on during the ‘Unleashed’ tour, as we promised to take it to our graves. ‘What happens on tour, stays on tour!’ as they say.
- 2013, Jacquie L'Etang, Sports Public Relations, SAGE, →ISBN, page 5:
  Inevitably, men who spent time together travelling formed bonds and friendships, which overlapped and supported their professional relationships. One of the results was the ‘what happens on tour stays on tour’ mentality, which recognised that humans—whether or not they are sportsmen—are likely to do dumb things from time to time.