It’s really irrelevant whether the parents can opt out.
Kindergarten children do not need this kind of education. Moral education is the parents job. The schools need to focus on making them literate and are failing miserably.
I am so sick & tired of the whining gays & their rights issues. I wish they would go back in the closet. Little children do not need to learn about sex. But if they must teach the kiddies about gay sex then tell them the whole ugly truth. Tell them just what gay sex is & what can happen to you if you practice it. By all means, tell the kiddies how they can die from AIDS. I know my sons would have come home horrified about gays if they were taught the whole truth about them in kindergarten. They would have had nightmares.