Looking at naturist brochures and a question that is asked over and over is "What do I do if the little comrade stands up"
So I wanted to find out what they used to do with the problem. Maybe there is some wisdom there.
Possible not quite what you're looking for, but according to St Augustine's Confessions, at age 16 he was in the public baths and experienced an erection. His father "saw the signs of active virility coming to life in me and this was enough to make him relish the thought of having grandchildren."
This would have been about the year 360.
Augustine's mother wasn't as pleased. She "became alarmed and apprehensive" on hearing the news, worrying that he was headed down the path of sin.
It might be worthwhile to crosspost this question to /r/AskAnthropology.