Disappointingly my only workplace 'experience'
Sorry if its a little long winded, though I always get worked up when I think back to this day.

I was 26 and a team manager in a call centre during one of my previous jobs, which was good because most of the girls were around my age.
There was one new girl in the team before I took over (just call her Jen for this) and I would always catch her looking over. She didnt always try to hide it considering she had to look over the desk cubicles to even see me.
She was a brunette, around 5'10 in her heels, her breasts looked like a nice handful ( I'd assumed close to a D cup).
She always wore slightly revealing clothing, but nothing too much to get in to trouble at work.
Other managers had tried dating their staff, which would go pear shaped and wreck the working environment, so I decided to steer clear and just joke around with everyone...
Me & Jen would swap emails through the day and she would throw in the odd flirt here & there, so we were pretty comfortable with each other.
Anyway, she told me how she hit her brothers car and that she wanted to repair it before he got back from overseas. She knew it was a Holden but couldnt tell me what model it was.
I look up a minute later and see her walking over with this cute smile on her face. She was wearing this one piece blue dress, something you would see some girls wear to clubs.
She squatted down next to me at my desk and started talking about this car & what it looks like, etc... So I start looking it up on google to help her out. Im looking up different photos and shes saying 'no thats not it... not that either'.
I wanted to look at her & what she was wearing, but at the same time I had to be professional about my role.
I then felt a hand slowly run across my thigh on to my cock... Obviously I was suprised though didnt want to show it in case anyone was looking (there was 1 jealous girl in the team that didnt like the fact i didnt give her the 'attention' she wanted). While she was squatted down her dress had slightly moved up her thigh, so I slowly reached down and ran my hand along her smooth skin.
My desk was towards the back corner of the room, so unless someone came over, there was no way anyone could see what was going on.
She started to slowly rub her hand up & down outside my pants... I turned and looked at her, and she had that same cute smile on her face.
It didnt take me long to get hard and she asked "You like it dont you". In a smart arse way I replied "How can you tell?" which made us both laugh.
Once I get started I dont want to stop, so I was trying to quickly think how/where we could continue.
I came up with a great idea, and asked her to stop and to wait for me at the elevators. I had to wait a little for my cock to go down before I could go tell my manager 'where I was going'.