Thanks for telling me about your school experiences.
Thanks also for the advise about sports changing rooms and knowing that erections happen. I thought it was good advise about how to prevent unexpected erection at an inopportune time such as keeping my thoughts as non-sexual as possible while changing. For example, to think about the upcoming football match instead of the date I have planned for later in the evening. Also taken up your advise to wear tighter-fitting underwear, such as briefs or boxer-briefs, instead of loose boxers. So If I do have an erection, it makes it less noticeable.