Hello & Welcome to Just Answers.
I agree with you that it sounds perfectly normal. What is interesting is the importance you're placing on the memory, and the emotional impact it has on you.
It might help you to look at it from the outside...most (if not all) boys and girls of that age are intensely curious about the opposite sex, and lots of them will do a bit of peeking around a time or two. 99.9% of the time, nothing comes from this, but the high emotions of the moment & fear of getting caught, and new discoveries mark the memory as an important one.
I would suggest that you let it go. At 44 years old, your identity should be pretty known to you - trust that.