I think it was more about not meaning to rather than not knowing. He knows what he did. He doesn't know WHY he did it.
Yes. Yes, I do comment in paragraphs. 
Dads, uncles, brothers, oh my! Check out list of (mostly) BL with kids: https://mangabuddy.com/manga-list/46295
Dads, uncles, brothers, oh my! Check out list of (mostly) BL with kids: https://mangabuddy.com/manga-list/46295