You probably don't like being compared to other women, so it makes sense that your partner would feel bad if you compared him to other men. It's natural to mentally compare him to other men — just keep those thoughts to yourself so you don't hurt him.
Backe told me, "Even if you compare him to someone else in a polite way, you're still making him feel insecure. Also, even if you're comparing him to someone who is obviously not interested in you romantically — like your sister's husband — it's not going to make him feel good."
He continued, "Especially don't compare him to an ex, which will almost inevitably make him feel insecure and cause him to wonder about your feelings in the relationship."
Laura Bilotta, dating coach and matchmaker, agreed. She told me in our interview that, while you should be comfortable to be open and honest with your partner, it may not serve any positive purpose to inform him if there are other guys you are innocently attracted to.
She added, "This is why it's important to have girlfriends to talk to. Have friends you can dish to so that your guy doesn't have to hear about how cute your neighbor's butt is."