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. 19:12
Trivia: What did Jesus say would happen after the gospel was preached throughout the world?
Only one more thing will happen before the end comes: the gospel will be preached throughout the world (14). Well, that and the abomination of desolations will stand in the holy place (15), many false Christs and false prophets will show great signs and wonders (24), the sun and moon will be darkened and the stars will fall (29), the sign of the son of Man will appear in the sky, everyone on earth will mourn, and then, finally, the great and powerful son of Man will come in all his glory (30).
Oh, and all these things will happen within the lifespan of Jesus' contemporaries (34).
Or maybe not. Jesus was talking about things he knew nothing about (36). (See Mark 13:32.) 24:3-51