Sexual orientation being taught in elementary school

I ran across the tweet and I personally believe that sexual orientation being taught in a public elementary school is amazing. I think it’s helping newer generations becoming more accepting of others. When I looked at the comments I was shocked that the majority of comments were disgusted of these practices. What are your opinions? Many comment were saying that this being taught exposes children to sexual activities which I also dont understand. Would you ladies be comfortable with your children learning this? I’m really curious. Should sexual orientation be taught in school? Elementary school?