Billy is not a real transsexual. But he thinks he is. He tries to be. He's tried to be a lot of things, I expect.
9 seconds sound clip from the The Silence of the Lambs movie soundboard.
You can hear this line at 00:57:04 in the Blu-ray version of the movie.
Quote context
[...]
- Why, Clarice? Did the rancher make you perform fellatio? Did he sodomize you?
- No. He was a very decent man.
- And you said that I was very close to the way we would catch him.
- On what basis would they reject him?
[...]