Frankly, it's their choice. We have free will. Just don't expect me to give a crap, treat anyone special because of it or teach my kids that it's normal. 1.7% (or whatever) falls well into the fringes of the Bell Curve. All I think we can and should ask is to keep intimate behavior where it belongs- in private, same as we expect of hetero couples. It's God's responsibility to judge our decisions and we all get sorted out in the end