Conversation in maths

Me and Lizzy had a very interesting conversation in maths today. I was thinking about a song that Kat-tun sang called Never Again, and in the song Akanishi Jin sings very high note, which not even girls can reach. So i asked Lizzy (since she knows practically everything) about boys singing in high voices. This was kind of how the conversation went:

Me: How come boy singers can sing in such high voices?
Lizzy: -mumbles-
Me: They get high voices because they get their testicles cut off, don't they? (I heard about this somewhere, but I wasn't sure if it's true)
Lizzy: -Laughs hysterically-
Me: Oh, it's not their testicles is it?
Lizzy: -still laughing- Yes but they can naturally high singing voice.
Me: Omg, Jin is gay!
Lizzy: No! Boys don't turn gay just because they have their balls cut off
Me: So it is the testicles.
Lizzy: Yes!
Me:
Lizzy: They just can't have babies!
Me: But why do they cut off the testicles to get a high voice?
Lizzy: It's because of the testerone. They usually do it to young boys so it stops the testerone from getting to the boys so they can keep their singing voice. But i think it's illegal to do it to young boys now, I'm not sure.
Me: That's weird, a 30 year old man with a 10 yr old voice.

-We talked a little bit more about this then Lyndsey joined in with our conversation-

Lyndsey: Why do gay men have 'gay' voices?
Me: Yeah, why?!
-Both me and Lyndsey look at Lizzy-
Lizzy: Why are you looking at me?
Me: Coz you know these kind of things
Lizzy: Well, I dunno, they just do. Maybe they have a girly voice but they try to put on a masculine voice so it turns out to be a 'gay' voice. (She was joking here)
-Me and Lyndsey laugh-

Note:
Please do not take offense in this, this post was not meant to offend anyone. It is just a record of a conversation i had that i never want to forget.