This turned me on.
First off, I get a huge thrill from masturbating anywhere where I could get caught. I masturbate in my car a lot, and outside my apartment. This is where this story comes in.
I was really horny one day and I was stroking on my back patio, this is about noon or so, in broad daylight. I was getting really turned on. So I decided to stroke outside my front door in the hallway. In my apartment building, there are doors to the outside at both ends of the hallway, and I have to be careful and listen for anyone to come out. But my neighbor that lives right across from me is a really hot girl that I would like to get to know better.
Anyhow, I opened up my door and stepped out into the hallway and started stroking. My cock was unbelievably hard due to this. I had been stroking for probably a minute when I heard my neighbor behind her door, most likely looking through her peep hole, and she made a kind of 'huh' noise kinda laughing, but quietly. So I ran inside and continued to stroke, looking through my peephole. She came outside shortly after and put her ear to my door to listen to me moan or something!! So I backed up a bit, and made some moaning sounds, and then she went back into her apartment, most likely to do the same thing. I can't believe she saw me and I am jerking off right now just thinking about it!