What do you make of those 'which have made themselves'?
Matthew 19:12
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.
Evidentally Paul himself was one of the last.
Do you know anyone who is a eunuch?