I was walking home from boxing training and stopped by a staircase to cum my brains out. Got all hot and going, moaning loudly since no one was around. Little did I know that there was someone inside the building by the window because they sneezed after I came all over myself. I ran out with my dick out and got all dirty with sweat and cum. When I looked back, I saw a head sliding down the window. Someone was spying on me all along...