1) Jessie and Channing's feet know they're a good fit. You might think the big giveaway is Jessie and Channing's leaning on each other, but nope. "Feet are very telling when it comes to non verbal communication cues," Donaldson explains. Channing and Jessie's feet are angled toward each other which is their subtle way of telling onlookers there's no one else they'd rather be standing next to. Okay fine, the leaning is a biggie, too. It means they're mentally in the same place; they have similar goals for the future. Stefanie Keenan - Getty Images
2) They're literally connected. "Both Channing and Jessie have fully engaged smiles with each other that involve their entire face, meaning they are completely focused on one another and dismissing everything else thats going on around them," says Donaldson. When they're together, it's like no one else is around. This is made even clearer thanks to the lack of space between them and the way they're turned toward one another. These are signs that they have a strong desire and physical connection in addition to their emotional one. Axelle/Bauer-Griffin - Getty Images
3) They're equals... Jessie and Channing are mirrors of each other here. They're both looking into each other's eyes and have one arm around the other. Their similar stances mean they're on the same page mentally and emotionally. And since neither is pulling the other one in, Donaldson knows neither one is more in control of the relationship. They're partners on equal footing. Steve Granitz - Getty Images
4) ...But Channing still makes protective gestures. "In this image Jessie leads the way, however the way in which Channing holds her hand firmly is a strong communication of reassurance and safety he is providing for her," says Donaldson. Channing is in what the expert calls "protector mode," but Jessie's grip on Channing's hand means she's totally okay with it. TM/Bauer-Griffin - Getty Images
5) Their expressions flaunt their love. This body language shows how emotionally invested Channing and Jessie are in each other, says Donaldson. Jessie giving him a peck for the photo and Channing's eye contact with the lens and smirk are their ways of showing how proud they are of their relationship and the love they have for each other. Channing Tatum / Instagram
6) The way Channing looks at Jessie says it all. This photo was taken right after Channing and Jessie got back together, and Channing's body language makes Donaldson sure he's in this relationship for the long haul. His look at Jessie is one of love and lust, she saystwo feelings that convince her Channing is "really into" Jessie and that's not about to change. Kevin Mazur - Getty Images