Maybe three isn’t a crowd.

When it comes to relationships, polyamory is a non-starter for many.

That’s a mistake, according to sex coach and podcaster Dr. Jaime Grant — who believes that the monogamy-minded are making their lives harder than they have to be.

As humans, we’re meant to grow and change throughout life. Who you were five years ago might be a different version of the person you are today. Grant said in an RMZ article that it’s important for people to allow themselves that same freedom when exploring romantic relationships and adventures.

Grant’s journey reportedly began when she discovered that the men she dated had no interest in committing to one person.

And while most women might roll their eyes at the idea, the expert suggests that these noncommittal men could be onto something — even going so far as to propose that the perceived need to settle down could be due to the pressures of society, and not be what we really want.

The anti-pairing off pro, who has lived a polyamorous lifestyle for over 40 years, said: “It’s helped me be braver about other risks I could take because I just wasn’t doing the norm, you know, I wasn’t marching in lockstep with everybody else around relationships.”

Grant describes monogamous relationships as a “closed system” which can make things difficult — especially for parents. She believes being in a polyamorous relationship allows for even more care, love, and help than you would get from one partner.

“I literally have a group of people who are deeply invested in my children and have supported me. These are not people I’m married to, these are my loves,” she said.

A common barrier to the lifestyle, Grant said, is when couples have mismatched desires — one wants to meet new people, the other does not.

In this sort of situation, she said, there’s “no wiggle room, you have nowhere to go” — leaving people feeling frustrated and stuck in their relationship or marriage.

Polyamory can be more about romance these days — with some couples choosing the relationship style for financial reasons.

Jennifer Martin, a polyamorous mom from Richmond, Va., previously told The Post that she and her husband Daniel were struggling to meet their rent until the couple welcomed a new tenant into their home — Jennifer’s boyfriend, Ty.

“Daniel and I definitely struggled financially before Ty moved in,” Martin, 35, said.

Ty not only dates Jennifer but he also lives with the couple where he helps split the rent and covers the cost of utilities and Wi-Fi, the free spirit shared.