No disrespect, but your last sentence explains why you would believe something like normalizing kindergarteners to sex. Simply because other people have had shared experiences doesn't make something morally right. There are tons of people who were molested as children, by other children and adults. These people have also written about those experiences and that doesn't make a good case to normalize for molestation or underage sex simply because it's something that others have done.

I don't want to give off the vibe that having mental health challenges doesn't means one can not think straight, but I think your mental health issues is interfering with the way you're processing the statements made by the transperon and your experience as a kid.