Most Helpful Guy
Sounds like you have low standards of who you let in your body.
Hickeys are usually a sign of easy to get females... I would hope he sees them and saves himself the trouble of finding out later.
He has every right to be angry if you are easy and trying to let him think you are not, because if he has morals and doesn't bang random people it would be wrong to have him assume you we the same.
Most Helpful Girl
Or just don't get drunk and hook up with every guy you see? I don't care if you're single. Being single and/or drunk isn't an excuse to be a slut.