Call it a cautionary tale of modern dating: The “mama’s boy” is an archetype we are warned to avoid. But is that for good reason?

Of course, being close to a parent isn’t inherently a problem, Rachel Sussman, LCSW, a New York City–based therapist and the author of The Breakup Bible: The Smart Woman’s Guide to Healing from a Breakup or Divorce, tells SELF. In fact, “a lot of guys text or talk to their parents every day. That alone isn’t a red flag.” The “mama’s boy,” culturally speaking, is distinct: not just a loving, doting son, but an emotionally stunted man whose bond with his mother seeps into every corner of his life, turning what should be an intimate partnership into a three-person affair.

Here are the biggest warning signs of a mama’s boy to look out for—and what to do if your partner is one.

1. He constantly compares you to his mom.

You cook dinner, and he points out how she does it differently. You mention wanting to quit your job to pursue another dream—starting a business, writing a book—and he reminds you that his mom “doesn’t believe in taking risks without a solid plan.”

At first, these throwaway references might seem relatively harmless, but as Sussman points out, they can subtly reveal who’s really at the center of his world—and who you’ll inevitably be measured up against every single time.

2. He turns to her for comfort instead of you.

Whether it’s a work-related setback, friend group drama, or just a bad mental health day, he doesn’t vent to you about what’s on his mind: He goes straight to his mom.

For the record, being able to communicate openly and vulnerably with your family is a good thing, Dana McNeil, PsyD, LMFT, couples therapist and founder of The Relationship Place in San Diego, tells SELF. But building real intimacy and closeness in a romantic relationship involves learning to lean on each other during these tough times. “That’s how couples build trust, security, and resilience,” Dr. McNeil says. Otherwise, you’re stuck in an odd dynamic where his mother is taking on the emotional duties that should belong to a partner, leaving you feeling like a third wheel instead of an equal.

3. He shares every private detail of your relationship with her.

It’s one thing to ask your parents for advice. But it’s another when someone airs every personal detail—about the tiniest points of tension, money matters you prefer to keep confidential, even intimacy issues that should remain in the bedroom.