For the ladies:
When it comes to polygamy, what I'd like to see is more young women finding an appropriate man and asking to join his family as a second wife (or getting her father to ask that). There's a very practical reason for this: single people have time to date, but married people don't. Married men don't have the time to date loads of single women, figure out which ones want polygamy and aren't scared off by the prospect, and suggest it to them. Married men who are doing their job are simply too busy with their existing families to take on the enormous additional time burden of dating - or the real risk of approaching the wrong woman, looking like a creep and potentially losing employment as a result.
So ladies, if you want to marry, don't wait around for a man to sweep you off your feet. The good men are too busy already with the first woman they took on, and her children. A married knight doesn't have time to put on his shining armour and gallop around the countryside searching for a damsel to rescue - but if a damsel turns up at their door they'll gladly rescue her there.
Also, although they know you exist, men as a general rule are not attuned to subtle cues so won't notice little hints that you're interested, and might see you no differently to the many other single women they know. You need to state this obviously, not bat your eyelids and then think he mustn't like you because he didn't seem to react to it (that's a silly example, but I hope you get my point).
The better the man is as a husband, the more he'll be focussed on being a husband, so the less likely you'll find him on a dating site or be approached by him elsewhere. If he's taking time off from being a husband to wife 1 to seek you out also, in the long run he might not be the most focussed husband on you either. (Obviously this isn't a hard and fast rule either, just a small observation to ponder.)
BOOM! mic drop....