"I was just joking!" Lisa justified herself, not knowing that her phrase before going to bed would be the last straw. A week later, her husband left.
According to a study in the Journal of Social Psychology , 67% of couples who use sarcasm or veiled insults in evening conversations divorce within a year.
Psychologist John Gottman , who has been studying the breakdown of marriages for 40 years, sounds the alarm: “There are phrases that act like poison. Pronounced before sleep, they poison the relationship imperceptibly, but irreversibly.”

What phrase are we talking about? It's not "I hate you" or "We're breaking up." It's the seemingly harmless expression "You always do this!"
The word “always” turns a specific offense into a personal indictment. “When my wife said, ‘You always forget to turn off the lights,’ I realized she saw me as a loser, not a human being,” writes an anonymous user on the Reddit forum.
Why is this so destructive?
Neuroscientist Dr. Amy Banks explains in her book, Four Paths to Intimacy: “The brain remembers negative phrases before sleep three times more vividly. They “loop” during the REM phase of sleep, forming a subconscious aversion to the partner.”
An experiment from the University of California confirmed that participants who heard criticism before going to bed were 40% more likely to wake up thinking about breaking up.
But there is good news. Replace “always” with “sometimes” and the conflict turns into a dialogue.
Example: Instead of "You're always late!" say "I feel sad when you're late." According to the Gottman Institute , couples who are late are 4 times less likely to argue.
Marriage and family therapist Linda McDonald adds: "Evening conversations should be a safety ritual. If you can't keep quiet, hug your partner. Tactile contact reduces cortisol levels."
How to avoid disaster
The 10-minute rule. If you're angry, leave the room. Come back when you can talk without generalizations.
“Thank you” instead of blame. Gratitude before bed increases oxytocin levels ( Journal of Positive Psychology ).
Turn on white noise or an audiobook to help interrupt negative thoughts.
But remember: If your partner continues to use "poisonous" language after you've asked, that's a red flag. As Psychology Today writes, "love shouldn't sound like a death sentence."