Lipsticks and Ladders

I work as a Computer Tech for a school division and as such from time to time I have to pull cables for new network connections. About 6 years ago we completely rewired one of our elementary schools. Usually we run the cables loose on top of the t-bar ceiling. I know, how professional of us, but that is a blog for later. We often find things on top of the ceiling tile, especially in the high schools where the students may be tall enought to put things there. Usually its garbage, like someone's choclate milk container. Or maybe someone was working up there and forgot a screwdriver or some other tool. If the ceiling tiles are missing people often throw things up there. When we wired the elementary school there were some missing tiles in a science lab and we found 2 new stuffed monkeys. We thought that was odd, but whatever. There were tiles missing there for several years and someone probably through them up there and forgot about them.
So when we were finished wiring the elementary school, I think it would be safe to say we had been in every nook and cranny of that school. Over the next couple of years I had to go back from time to time and pull more cables. One particular day I was pulling a cable from a new room back to our switch in the library. I'm on the ladder and I'm lifting the ceiling tile and something starts to fall on me. I put my hand up to catch whatever was laying on top of this tile and through my haze of disbelief the realization starts to hit me. "This is a bag of lipsticks falling on me!" I get down off my ladder with a bag containing 30 or so lipsticks. The lipstick were mostly red, some were new some were very old. Some had been used, most looked as if they had been dug with someones fingernail. Some had a bunch of fine scratches and looked as if they had been drug across a beard.
How did they get there? I had to have a ladder to reach the ceiling tile. So whoever put it there probably did to. Why did someone put them there? One of the teachers said someone was standing in front of a mirror smearing them on saying "I feel pretty" Yikes! No one ever admitted to owning the lipsticks. Another mystery I'll probably never get to know why?