I had a co-worker my age of middling attraction that worked in the desk next to mine. She always used to ask me to help her set up things like her computer, fix problems in the office, etc.
One day everyone else had left the office and it was just the two of us. She walked over to the water cooler and bent over to fill her cup. She was wearing a shortish business skirt and her ass was just hangin there like a ripe fruit.
I was so tempted to spank that booty and see if she was down, but I was 95% certain she was too professional to bite. And I would have been out of a job so…