To me it is risk reward. The reward for your daughter is she can be out about her gayness.

The risk, which seems very real, is she will traumatize 10 year olds. When I was 10 I did not even know what sex was. Why should children that young be told about a variation about sexual preference when they are too young to be told about sex? Even if they know about sex, knowing about gayness in any detail seems unnecessary.

I have experiences where children too young were told about family members being gay before they knew what sex is and they are now in a major mental illness. To me the risks outweigh the rewards so if you want my opinion, have your daughter be discrete.

If a nineteen year old is mature enough, why can't she simply not bring up sex the way a young sexually active straight woman would not talk about sex with preteen children?