Some people have some pride. A few friends and myself went to a club to celebrate my birthday 21st- anyway one of the friends became very ill ( I went out to the toilet to see if she was ok) and as she was vomiting there was like a false tooth sitting on the cistern - I lifted it and threw it down the toilet - it was hers and she had taken it out to vomit. She never really told me the truth but did I feel awful (for a minute)
I should think you did feel awful .... you went out to the toilet to see if she was OK but instead you decided to throw her tooth down the pan. That's a grown up thing to do at 21 years.