Hee! This just goes to show that teenage boys really will do anything on a dare!
They waited until Peter had left - I would have too. It wasn't that they were hiding it from their friend - ok, yes it was... the three of them had been having threesomes and twosomes behind his back.- well, duh. Why would they want to have one in front of his back? Eeewwww. Peter's icky. LOL!