Perhaps you are right.
But we as a collective society do not consider it acceptable for very old men to have sex with very young girls (or boys). Even if teenagers are having sex at 13, 14 or 15 we only think it is socially acceptible if it is with other 13, 14 or 15 years old because they are of a similar mind, maturity and we accept that both experimenting and trying to figure things out. They are entering and progressing through similar stages in life. Turning from child to young adult.
When a 55 year old man "grooms" a 13 year old girl (or boy) he is considered a dirty old retch. We look at it from this perspective: He is using his life's experience to manipulate a young child into having sex with him. In our society this is considered immoral and heinous and thus we have outlawed it. Of course in ancient Greece it was not considered immoral for 55 year old Socrates to have a relationship with a young boy. Different society and different perspective. But, it was still illegal on the books - hence the hemlock. That sort of says something doesn't it?
Anyway, incest is taboo in most countries for a damn good reason. Sure Pharaohs and the like may have practiced it but they were considered Prophets and Gods and the political implications meant they had to keep it in the family. And like I said, from my perspective Lot lied to his daughters, told them to wait here while he went back and murdered his wife. He then drugged and raped them and topped it off by blaming them for seducing him! Which is the typical excuse pedophiles still use to this day.
Who is this Lot anyway? Another YWHA Prophet? Sounds about right
Oh good. Now you should feel better.