That's a fascinating observation, and you are exactly correct about the biblical reference to eunuchs from birth:
Matthew 19:12 (King James Version)
"For there are some eunuchs, which were so born from their mother's womb: and there are some eunuchs, which were made eunuchs of men: and there be eunuchs, which have made themselves eunuchs for the kingdom of heaven's sake. He that is able to receive it, let him receive it."
Thanks. I just didn't have time to look up the reference myself.