We all know the telltale signs of cheating. The definitely-not-suspicious 3 am texts from Domino’s Pizza … or Settings or Slack. The sudden surge of last-minute, non-cancelable business trips keeping your partner anywhere but your bed. Their phone, which they once left casually on the kitchen counter, on the couch, and on the coffee table is now glued to their hand … and is now decked out with more security features than Fort Knox.

But even with their status as the tried and true ways to tell your S.O. has been two-timing you, these are far from the only ways to detect infidelity — just ask a whole lot of heartbroken Redditors.

From taking their sweet, sweet time in letting you meet their friends to random arguments and sudden spurts of jealousy — alongside something else, probably — here are 20 uncommon signs hinting that your partner just might be cheating on you, as told by the fine folks of r/AskReddit.