5 weird and silly things people in love do, according to psychology

Ever find yourself burying your nose in your partner’s hair or neck? You’re essentially “scent-guarding.” Based on Helen Fisher’s work on evolutionary psychology and a 2024 study in Chemical Senses, we are wired to sniff our partners to check for genetic compatibility and emotional grounding.

Their unique scent acts like a natural sedative, lowering cortisol (stress) levels. When you’re stressed, your brain seeks out their specific “scent profile” to regulate your nervous system. It’s a subconscious way of reminding your brain that you are safe. If they smell like “home,” your biology is doing its job.