NSFW- Women, when I was young, and you were young, did you notice?

This is not a particularly deep question, but it is gnawing at me now.

I was reading a funny article today about inappropriate erections.

It was pretty funny until I remembered that awkward period between sixth and ninth grade when I got spontaneous erections in school. Everyday. Like six to twelve times a day. And just before the period bell rang to get up and go to the next class.

I am older now, can handle the truth, and I am curious:

Did you notice when boys in school got those?

Any teachers in the community, are you aware of this phenomenon?