Seems that there is more anthropological evidence for polyandry out there than has been typically noted, even beyond what is in Sex at Dawn
8 Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. 9 I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.”
10 The disciples said to him, “If this is the situation between a husband and wife, it is better not to marry.”
The heading of OD 2 is excellent
11 Jesus replied, “Not everyone can accept this word, but only those to whom it has been given. 12 For there are eunuchs who were born that way, and there are eunuchs who have been made eunuchs by others-and there are those who choose to live like eunuchs for the sake of the kingdom of heaven.