[F] Exploring myself on the empty floor

I work in an office building and last month the company in the floor above mine moved out. Since then, it’s been empty and the doors have been locked. 

As I was returning a set of keys to the lock box I noticed a bunch of keys labeled with 5th floor, which is the empty floor. Me, being an explorer, kept the keys and waited for the perfect moment to get away and explore. 

I finally had my chance when I finished working. Instead of going down to the parking lot, I snuck upstairs to the next floor and tested my key at the door. It unlocked and I slipped in, making sure to lock the door behind me. I finally found a quiet place at work where I could do anything I wanted. 

Almost immediately, my mind started to wander. I knew that nobody else could get in since I had the keys. This is also the top floor of the building so nobody could see me as they walked past. I wondered if I could use this place to touch myself whenever I wanted.