For there are eunuchs, who were born so from their mother's womb: and there are eunuchs, who were made so by men: and there are eunuchs, who have made themselves eunuchs for the kingdom of heaven. He that can take, let him take it. (Matthew 19:12)

Continence is a discipline that can help some grow in accordance with the kingdom of heaven, but it is not required for entrance and not all are capable of it. We must not confuse a discipline with the objective we seek to attain. Our goal is the kingdom itself, not continence, continence being a means and not the end.