PP wrote:We have no evidence that Jesus even existed so shut up about him already.
I disagree. There is evidence that Jesus, son of Joseph and Mary, did exist. What is in dispute is his status of divinity, which comes down to a question of one's faith.
In any case, there is no evidence that Jesus married, or had sex with, multiple women, some married, some very young. Although Brigham Young did a lot of projection in saying that Jesus had to be a polygamist in the JoD, there is just
his wild notion that this is the case.
As far as answering the OP, I think that the polygamy move was more about power than sex. I have a meeting to go to, but will expand on my thoughts on this one in a bit.