Adultery is something that goes back from the days of Moses or Abraham if i am not mistaking; the story with Sarah when she and Moses or Abraham went to Egypt and one of the men slept with her because her husband was afraid that he was going to be killed if he had told them that they were married. This is something that was not solved in the past, even thought God talked about it as being inappropriate it still occurs. We the people today can individually play our parts, but we also have to walk with the mindset that we cannot solve all of the problems because God did not solve all in the beginning. He tried, but we human ruined it all for him. Sin is already in the world from the beginning of Genesis to today. It's going to be very hard to collectively eliminate sins. You talking about it now is playing your part on the micro level which is great.
You and I knows fully well that the STDS that is in our community today, were no worries of those in Biblical days, therefore we can't compare those days to ours. If you care about knowing more on what the Holy Bible actually says concerning all of these things, you can contact me for a one on one discussion. thanks