About the fifteen year old and abuse: I would like to add what I think is a unique perspective.
Although my coach was closeted, she was not hesitant to have sex with me at fourteen (she was 26). We parted when I graduated from high school and left for college. I will always be grateful to her for bringing me out.
And the so-called experts want to say that I was exploited and manipulated? Give me a break! Any power imbalance was in my favor -- my coach was always giving and loving and tender, and never demanding! Was I damaged by the relationship? Praise the goddess, no! It did nothing but affirm my love for women.
At age nine, she started having sex with other girls with my support and approval. My daughter looks femme, yet acts very butch and is completely secure in her sexuality. Her early experiences were with girls at school, in the neighborhood, on sports teams, etc. Actually, she had a lot of them.
Then at age twelve, she developed a crush on one of my friends. She told me about her feelings, and I replied directly and emphatically that I approved. Since that time she has mostly dated adult women. Whether we want to admit it or not, there are lots of lesbians who include teenage girls among the types of women they find appealing, sexually and otherwise.
My wife and I have dedicated ourselves to being good role models for these girls. We refuse to dismiss or minimize their sexuality, and we support their inherent right to express it, even with adult women.