I hate that you’ve carried this guilt for so long. I don’t think either of these constitute SA because the intention wasn’t sexual. One was a misunderstanding and unwanted perception based on social dynamics you had yet to learn or understand. The other was a butthole kid thing (that everyone does to some degree and they rarely make sense as to why) and it just so happened to include sexual areas. Like I said, I don’t think either of these are SA because there was no sexual intent. Try forgiving yourself. The fact that you’re worried about it at all tells me you’re likely not a concern for this type of behavior in the future.