Our oldest son is currently discussing polyyny with a young lady. Not because he has interest in having more then one wife, (as a young man of almost 20, with no real prospects, he has a hard time imagining having one wife) but because he knows it is biblical, and truth in doctrine matters. He isn't the sort to misrepresent himself in any way, so he discusses unpopular doctrine with his young lady friend, instead of pop culture. Thats my boy!
Sounds like a fine young man.