2.01: QOTW Strikes Back!

In response to the public clamor for more annoying emails from me, I'm bringing back the Question of the Week- I'm going to try and keep it going each week for 2008, we'll see if I can pull it off.

I had two questions in mind for this week. I was going to start with the serious one. We're all a year older, a year wiser, a year more mature. I figured I wanted to start the year off right, set the tone for a greater tomorrow. Then I realized that this is America, dammit, and I have an audience to consider.

So here's a question about sex:

So you're at a party with all of your friends at one of your friend's house. You're having a great time, drinking a few beers, but taking it easy. It's getting late, so you go to get your jacket, which you had put in the host's bedroom during the party. You walk in and turn on the lights to find your jacket. As your eyes adjust, you see two of your best friends (one male, one female) having sex on top of the hosts bed, all over the jackets that people had left there. Yours has been thrown off the bed, so you grab it and make a quick escape.

You later find out that the two had been completely, utterly wasted. When they were done, they parted ways AND HAVE ABSOLUTELY NO MEMORY OR KNOWLEDGE OF IT. They aren't dating, and as far as you know, have no interest in dating. They used protection (yeah, you got close enough to tell. It was gross.), so you know there's little chance of STDs/pregnancy.

Two part question:
1. Do you tell them? If you don't, they will likely never find out.
2. Do you tell the friend whose bed just got utterly violated?