Sitting is a recurring ability in The Legend of Zelda series that allows Link to interact with certain objects by halting his movement and sitting on or near them.
In Skyward Sword, Link is able to Sit on multiple objects: chairs, benches, stools, drums and the toilet in the Knight Academy. The action is similar to sleeping in that it regenerates Hearts. Hearts are regenerated at a rate of one Heart per second while Sitting. If Link Sits for long enough without moving, he will fall asleep and begin to fall off of whatever he is Sitting on before catching himself. Certain characters will remark upon Link Sitting on certain objects, like the Mogma in the Thrill Digger game and Owlan in the Knight Academy.
Breath of the Wild
Link Sitting at a table in the Knight Academy
Link Sitting on a bench in Skyloft
Link Sitting on a stool in front of the Thrill Digger game
Link Sitting on a Drum in Eldin Volcano