Fact 3 - There may be some haggis involved
You know haggis, that Scottish delicacy of sheep's brain, heart, lungs, and spices boiled in its own stomach. Mmmm.
Fact 4 - Kilts are the approved dress code for a Burns Night party
That said... if you (ugh) already wear a kilt to work every day, or are allergic to tartan, don't worry, there're plenty of other non-shin-baring ways to get authentic (Scotch, we're talking about drinking Scotch).