I made one mistake in my life that nobody can seem to ignore or forget. In an effort to save money when the kids were young, I would always cut their hair. However, once when I was cutting daughter #2's hair, she moved. As a result, I nicked her earlobe with the scissors. It wasn't a bad cut--it did not require stitches. It did not bleed much. I felt horrible, though the small cut healed up nicely. Still, nobody has forgotten the incident.
My family does not trust me with a pair of scissors in my hand. Daughter #2, scarred for life, grew up and now cuts her own hair.
Last night, my mother asked me to give her a trim. She was desperate and just too tired to go to a beauty salon now that she's getting old. Nevertheless, when she sat down in the chair and I picked up the scissors, she put her fingers over her earlobes. I trimmed the back of her head first, but I did mention that in order for me to trim the sides evenly, she would have to remove her fingers. She did, but she was rather tense throughout the ordeal.
I finished the job without bloodshed, but I know that doesn't mean my one mistake has been forgotten.