One of my friends at school lost his virginity at a sleep over party. I was at the party in the day but decided I did not want to sleep over so I left. My other friends sister (it was their home) was a few years older, she was 19. That night everyone got drunk. Later, she went to each room and slept with every single guy visiting, 3 of them.
My friend 'confessed' this to me on the bus on the Monday to school. He had initially thought she had had sex only with him, then later in the morning when he met up with the other guys found out she had slept with everyone.
When he said this last part, he put his arm across his eyes, broke down in tears and actually leaned forward and hugged me.
I said nothing.