Brian Austin Green learned to build his relationships around friendship instead of physical attraction after splitting from Megan Fox.

The 52-year-old actor - who has Kassius, 24, with Vanessa Marcil, Noah, 13, Bodhi, 12,and Journey, nine, with Megan, and Zane, four, with partner Sharna Burgess - admitted he "didn't expect" his 15-year union with the Jennifer's Body star to come to an end but he turned to therapy to help him figure out his bad habits in his romances in the hope of forging a brighter future.

Speaking on the I Do, Part 2 podcast, he said: "Until Sharna [Burgess], my ex and I were together for almost 15 years. We were married for almost 10 years and I led with physical attraction.

"First, I'd be physically attracted to somebody and then sort of build a relationship around that.

"I was divorced, which I didn't expect. I had three kids. I was a single parent.

"And I knew that I didn't want to repeat things that I had done. So I went through all sorts of therapy and all sorts of things to really figure out what it was that I brought into a relationship that was just toxic and wasn't good and wasn't helping the relationship at all."

After working on himself, Brian, realised he needed to "be friends with someone first" before pursuing a romantic relationship and adopted this "different" approach with Sharna.

He said: "I think when you started from a place of a genuine connection with someone, then you're not so concerned about whether they are truly into you or not, because you guys are already speaking to each other in a very transparent way.

"Sharna and I talked about our best qualities and our worst qualities together. We sort of put it all out on the table.

"For us, it was pretty apparent then like, 'Oh, hey, we should stick with us. This seems to be working.'

"Your approach to a relationship is the best way to know if it's just a purely physical connection. That's only going to last for so long that you're going to get to a point where you go, 'I can't stand that other person. So they're not hot to me anymore.'"

The Zombie Plane actor also admitted it took a while to find the right mindset when it came to co-parenting his kids because he was initially focusing on his sadness at missing out on "half the life" of his boys.

He said: "I know I grieved the concept of missing half the life of my kids. That meant a lot to me. That was a big deal.

"Then I quickly realised, 'Oh man, while they are at their mom's house, I get a chance to recharge.'

"Then when they come back over, I can give them all of my attention. And I've spent the four days out of the seven days or whatever it is just taking care of myself and being with my partner that I have now and doing things for me so I don't have that overwhelmed feeling the same way when my kids come back."