No. No, it wouldn't, and one concern about the inclusion of LGBT material in the curriculum for younger and younger children is just that. Early sexualisation under the guise of diversity and inclusion.
It's time to call it this and refute the diversity argument. ANY early sexualisation is inappropriate at best and frankly I'm inclined ask searching questions about those that support it.
Increasingly schoolchildren are coming from Lesbian/Gay families so questions will arise about this among pupils from traditional families. Its important that teachers are trained to deal with this in a sensitive manner. That should not include encouraging kids to be gender fluid and it doesn't have to include actual sex education.
I'm bisexual and I think i first started wonder about my sexuality around puberty but other LGBT people I know say they had inklings much earlier. I don't know what the correct age for actual sex education to begin is but when any sex education is introduced then it shouldn't stigmatise LGBTs. But nothing wrong with saying that approx 95% of people are straight.