That bliss you’re enjoying with a new significant other may make you want to hold hands wherever you go. However, doing so on a busy sidewalk is always impolite. Thomas says that, while it’s okay to walk hand-in-hand when there’s enough room on the street, the second someone else is coming, or other people are trying to get by, you should switch to single-file. (There are, of course, certain exceptions: people who need assistance walking, individuals walking with caretakers, and parents holding children’s hands.)