It’s easy to judge people based on their family setup (whether it’s fair or not). The “momma’s boy,” for instance, is overly dependent and immature. The “only child” has historically been characterized as selfish or spoiled. But there’s one particular dynamic garnering more positive attention: men who grew up with older sisters.

Consider Luke Dunphy in Modern Family. He’s goofy and a little scatterbrained, sure, but he actually respects the women in his life. (A rare trait for a sitcom teen boy). Or Robert Irwin, whose stint on this season of Dancing With the Stars has already included several moments of praise for his big sis and inspiration, Bindi.

Of course, having an older sister doesn’t automatically make a guy a saint. But older siblings do have the unique position to act as both an influence and a peer—close enough in age to feel like a friend, but with just enough authority to keep you in check. So for men raised with female role models in particular, family therapists say this relationship can be uniquely formative—and a standout quality to look for in romantic relationships. Here’s why.

Younger brothers are molded to be thoughtful.

Sure, anyone can fake good manners when they’re trying to impress a first date (or score a hookup). But genuine thoughtfulness—the kind that comes naturally? That’s often drilled into you by older sisters who demand it as a given, Nari Jeter, LMFT, a licensed couples therapist in Florida and cohost of The Coupled Podcast, tells SELF.

A woman, for instance, might hardwire small courtesies (holding the door, offering to carry a heavy bag, showing up on time) into their younger brothers—acts plenty of men (unfortunately) could use a little reminder on. Essentially, they’re used to meeting an expectation where rudeness and thoughtlessness aren’t tolerated—because their older sister made sure of that.

They’re also empathetic about what women go through.

“Younger brothers who are close to their older sisters tend to have a deeper respect and understanding for women’s lived experiences,” Erin Runt, LMFT, a Chicago-based licensed therapist, tells SELF. They’ve probably seen (or at least heard family dinner rants about) the emotional fallout of cheating exes, the casual misogyny in the workplace, and the relentless hell of a monthly menstrual cycle.

“Part of building empathy requires having exposure to these firsthand experiences,” Runt explains. So a man who’s grown up to watch a close female figure navigate disrespect, setbacks, and everyday challenges is far more likely to understand their impact—which might ultimately influence how he treats other women in his life.

They aren’t afraid of vulnerability.

Unfortunately, toxic masculinity often teaches men that showing emotion is weak. Growing up in a household with women can subtly rewrite that outdated narrative.

More specifically, Jeter points out that “older sisters are more likely to encourage—or at least not punish—boys for having feelings,” creating a space where crying after a breakup or asking for comfort after a stressful day isn’t something to be ashamed of. It’s just part of being human. Over time, this early lesson in vulnerability can lay the groundwork for the kind of emotional availability that makes men reliable, empathetic, and self-aware partners.

They’re strong communicators.

On that note, guys with older sisters often inherit a hidden superpower: a robust emotional vocabulary.

According to both experts, women are generally socialized to articulate their feelings—to say, “I’m frustrated,” “I feel hurt,” “I’m anxious,” during a fight with a friend or while navigating early relationship jitters. By observing this type of clear communication, younger brothers are more likely to pick up on the same skills: noticing uncomfortable emotions and learning to put them into words. So instead of bottling up irritation (and becoming resentful) or straight-up ghosting after a conflict, these kinds of guys may be better able to say, “I felt unprioritized when you canceled plans,” or, “I’m stressed about work and need space right now.”

Some relationship skills take time to build. Others require constant effort. In rare but convenient cases, a lot of them just get baked in organically—and that’s the hidden advantage of being influenced by a protective, guiding sister who sets the standard on how to treat other women.

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