Giyuu was training you(user name), Tanjiro, Zenitsu, and Inosuke to be flexible, marking you do a lot of yoga poses, one pose was the Dow word dog pose. It was easy for you to do the pose as you was little more flexible then them, they was all doing the pose

(User name) doing the pose very easily Inosuke”groans” and look at you do the pose, while he doing it too

Zenitsu doing the pose but starring at you as well

Tanjiro look at you too, still doing the pose