Is it normal to think about other people sexually while in a relationship?
Yes, it’s normal to have sexual thoughts about other people while you’re in a relationship. A thought or fantasy doesn’t automatically mean you love your partner less or want to act on it.
Being in a relationship doesn’t switch off your ability to notice or imagine other people. Lots of people have passing attractions or fantasies, even when they’re happy with their partner; how often it happens varies from person to person.
What matters more is what you do with those thoughts and what agreements you and your partner have. You can have a fantasy without pursuing it, and you don’t have to confess every passing thought. If the thoughts are taking over, upsetting you, or pointing to something you want to change in the relationship, it may be worth talking that through—without treating the thoughts themselves as proof you’ve done something wrong.