Most likely

You stand there naked covering your genitals as everyone of the students near you is watching. You then feel a stinging smack on your bare butt cheek and due to the pain and suprise, your hands fly up and leave you fully exposed. You see three girls eyeing your dick and hear two more break out into giggles. You cover yourself again and turn back to see the person that gave you the slap is a guy you have in English class who likes to make trouble.

You start to edge toward your next class and gradually pick up speed until you are slowed to a stop by a cluster of female students who have broken out into a shoving then fighting match in the middle of the hallway. You try to edge past them but a chubby girl shoves another girl with dark hair and tight jeans. She stumbles and falls back into your naked body. You too fall backward and move your hands to brace your fall. Her perfect ass crashes hard into your bare penis and you let out a groan. She tries to get up quickly and grinds her jeans painfully into the soft meat of you cock. She never turns to acknowlege you and scrambles up to keep fighting.

A male teacher steps in and breaks up the fight as you cover your sore dick and head to class. You glance back once more when the girls in the fight raise their voices again. That's when you bump into someone.