I have not seen the movie, but I know that experience.

I think it is, because while travelling you are not bound by social expectations and boundaries. "What if I behave weird, then everyone will know in eternity".

No, you meet people and you (both) can relax, because you know you can just move on the next day and never see anyone here again. So you can let go off all that fear and anxiety .. and suddenly you can connect with ease.