Clearly, the teacher mishandled the situation. She must have been enjoying the fact that she made you sit there stark naked in the lobby. She should have found you a towel or something to cover yourself. She could have checked the lost and found for something, or got something like a team jersey and shorts from the gym. Do you think she may have found your predicament arousing and wanted to see you naked for as long as possible? I imagine a lot of the other students were aroused as well watching you cum in front of them. What was it like going back to school after everyone saw you naked with an erection and ejaculating?
Wow! That could either be very traumatic or arousing, depending on how the girls reacted to looking at your naked body. I think I might have found that stimulating, especially if they enjoyed what they saw. I presume they took their time during their inspection. Did you get an erection?