It’s not even necessarily arousal either which could make for some awkward moments, especially as a teenager. I started doing the tuck because a couple times in class, completely focused on my work, when the bell rang and I snapped out of my work to get up and leave I realized I had a full on boner so I couldn’t stand up right away. I don’t even like math, especially like that! I’m a lot older now so the random events aren’t as often but they still happen.
That is interesting how your experience would be flipped like that.