One or more characters are standing; their bodies are being supported by their feet, or by either foot.
Most often, standing characters are absolutely upright; search for standing bent_over or standing leaning_forward for when they are not.
This tag is still applicable where the character is in the middle of certain actions that keep upright posture such as walking.
The following tags implicate this tag: standing_cunnilingus, standing_on_chair, standing_on_liquid, standing_on_one_leg, and standing_sex (learn more).