This one is really interesting. Here it is.
Leviticus 21:7 They shall not marry a harlot or a woman who has been defiled; neither shall they marry a woman divorced from her husband. A widow, or one divorced, or a woman who has been defiled, or a harlot, these he shall not marry; but he shall take to wife a virgin of his own people.
So, you cannot marry a woman who has been defiled, or a woman who has been divorced. You can only marry a woman who is a virgin of "his own people". First, what does "own people" mean. Race, culture, orientation? What about a woman who is a virgin to her own, but has had encounters with those outside of her "own people". Ugh, the whole thing is so confusing.