Here's an actual answer: http://www.bentvoices.org/bentvoices/feinstein-blindandgay.htm
Edit: The whole story is worth a read, but here is a relevant bit:
I knew that I was very different from the other kids, and I felt horribly lonely. I didn't fit in with the sighted kids, but what was worse, I didn't fit in with the blind kids, either. All the boys were interested in sports and rough games. I wasn't. Some talked about girls, but because I was blind from birth, and because nobody ever talked to me about sex, I had no idea what was being discussed. I am ashamed to say that I didn't even know the difference between girls and boys, except that girls were usually nicer to me, and yet, I felt a strange feeling when hugging a male student.
When I was 15 years old, a girl explained to me how babies were born. "You're very stupid!" Harriet told me. "Your father stuck his penis in your mother's hole, and that's how you were born. Don't you know anything?" I wanted to ask more questions. Where was this hole? What was all this talk about "hard-ons" and "erections?" But I knew that if I admitted how little I knew, I'd be laughed at, so I kept quiet. I could not ask my mother. She never talked about such things, and I knew she would only be upset and tell me not to ask so many questions. So, I ordered books in braille about sex, and read them, and had a vague understanding.
What is surprising, and very important, is that I began to realize that I was attracted to other boys and men, and not to women. I realized that I had a strange feeling when close to people of my own sex that I did not have when I was with women. I somehow knew that this was not the way it should be, and never mentioned it to anyone.