Do you think it's okay that an 11 year old girl sends me voice clips of her moaning?
No, I don't think it's okay. Are you interested in young girls.
When I heard her moans it gave me boner, my dick got stiffened by the sounds of her
You shouldn't experience sexual attraction to children. Not only will it lead to illegal behavior, it's harmful to the child. You should seek immediate professional help instead of engaging in these types of activities.
She's just a horny little girl with nothing better to do that having a phone sex with me.
As the adult you should know better and follow the law. It's not okay and you will get caught and harm someone. Is it really worth the risk to you?