When I turned 18 (which was in the 90-ies) my father gave me a new computer for my birthday.
It was an actual tower computer, it was my second and I was not tech savvy then. So I called one of those small "anykey" computer firms to plug everything where it belonged and move stuff from my old one.
The next day a young man came, quickly assembled everything, I paid the fee.
And then I naively offered him a cup of tea and a piece of cake that was left over from the day before.
The guy went pale, mumbled something about being very busy, and left so fast like his ass was on fire. He even forgot his neat screwdriver on my table.
Since I was an honest young woman, I called his firm and politely told another man who picked the phone, that their serviceman has forgotten a screwdriver at my place.
They promised to tell him to come back and pick it up.
And guess what? I still have it.