A Secret Encounter

Teaching isn't my first career; I used to be a journalist before settling for this stable job. Yesterday, an old friend from those days contacted me through Facebook, inviting me to a private event in town. It turned out to be a secret BDSM gathering. Despite myself, I was intrigued and played along as someone else's dominant for the night. Reflecting on it now, I wonder what triggered such behavior after years of detachment. Anyone have insights?