All of the songs on the radio have something about infidelity in them...and it is usually glamorized. Movies that I used to love are now ruined because I now see the cheating that was in the stories.
I get really disgusted because it seems everywhere I look/read/hear people are talking about sex. This is the angry, bitter, BS talking, but these things make humans look like pigs. People going to the edges of the earth just to get laid.
I seem to be better able to tell when someone is lying to me though. But (unless it directly impacts me) I pretend that I believe them by nodding my head.
I also find that people that I used to know that had cheated/was the OP/or helped cover up an A have become much more questionable to me. Before I knew it was wrong, but I thought "Oh, it's in the past, they aren't going to do it to me or again...why worry or think less of them. It's a mistake." I gave these people too much credit.