Naked Student Wank in Public Wc

After classes at college, my classmates and I went to the mall. Many went to the gaming area with the slot machines, and I went downstairs to the restroom, where there was little activity, to completely undress and walk naked in a public restroom right in front of an open door, which excited me every moment, because anyone could come in - a stranger, a classmate, the staff, and catch me like that.