"personal letter" from our female president inviting us to one of the semi-annual meetings. This lady was probably in her 50's or early 60's at the time and was fairly new to the company. On a previous walk-through in our department she briefly sat with one of my male colleagues as he showed her the functionality of one of our new systems.

This guy was out of the office when the letters were dropped off at our desks. We carefully opened his letter and had one of our female coworkers hand write a P.S. to his letter that said something like, "I really enjoyed sitting with you a few weeks ago and hope we can make some time after the meeting to get to know each other better over drinks...." and signed her name with a heart. We sealed it back up very carefully and set it back on his desk.

A couple of days later when he returned, he opened up the letter as everyone tried to not pay attention. He did a double take after reading the hand-written note his face turned really red (this dude was your typical "very Mormom" LDS 25ish year old). Everyone did their best to not react, but it was over after 20-30 seconds and everyone lost it.