What is the lean test?

This TikTok shows Lil’ Dicky leaning in to his girl. He’s holding her, she’s holding him, but he’s leaning WAY into her. According to this guy, that’s not good. A girl should be leaning into you, guys! Look at John Krasinski and Emily Blunt, she’s all over him and their relationship is strong. Again, this is all according to this relationship guru in the video, but it’s definitely worth taking a second look at some of your photos in your phone… who’s leaning into who in your relationship?