Don't you just love how action-packed the Bible is? I do.
Take Genesis 6:1-4, for example. Here are the first two verses:
And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them, that the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose. Genesis 6:1-2
How's that for a great story, eh? The sons of God had sex with the daughters of men.
But who were the sons of God, you ask?
Well, it beats the hell out of me. Christians often call Jesus the son of God, but he wouldn't have been one of the guys having sex here, would he? I doubt it. It was probably a bunch of perverted angels. At least that's what most believers seem to think.
Okay, so angels came down and had sex with women. Why would that matter to anyone?
Because that is why God decided to reduce the human lifespan from 900+ to 120 years. The reason no one is older than Edna Parker (who turned 115 yesterday), is that those damned angels had sex with women. At least that's what God seems to say in the very next verse:
And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years. Genesis 6:3
So God reduced the human life span by a factor of 8 because angels had sex with women. (Or because all men are flesh. But that doesn't seem likely -- even for a half-crazed God.)
Oh, there are a couple other things to tell you about: giants and "men of renown". Here's what the Bible has to say.
There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown. Genesis 6:4
I don't know whether the "mighty men of renown" were giants or what. But I just thought I'd throw that in, since it was just thrown into the Bible.