Is it normal to be turned on by voice cracking?

So I was slow dancing with on of my friends boy friend and we were talking and his voice kept cracking and I though it was so cute and I think I was getting a little turned on by it. I was talking to his brother later that night and his voice also cracked and it was so cute. The brother are both close to 30 so they are not going through puberty or anything like that. It just happens sometimes, but i can't help but smile when it happens.