How I 30 [M] kept my coworker 35[F] from laughing

Hey, first time posting here. Adding that I recently posted a version of this story in r/truebigdickstories for what will hopefully become obvious reasons. Enjoy!

I was working as a temp at a law firm in the early aughts. It was a pretty chill atmosphere. All of us temps were off away from the lawyers on a floor in a cube farm. The group of us could bullshit all day with each other. It was a mix of actors, people who wanted a taste of a firm before law school and those, like me, who were there for the paycheck unsure of the next step. These temp gigs could last for years if you let them, and this was my second long run at a firm while I figured out what I wanted to do.