This all first started a few months ago when I had gone over to my friend's house and rang the door bell. As always, I had leaned over the rail to peek into the window to see if anyone was home. To my suprise, my friend's sister (pretty attractive, nice blonde hair, thin, two or so years older than I am) came walking toward the door in just her bra and pants, then realized she had no shirt on, and ran upstairs. My friend's mother said, she was sorry about that and let me in. I was just thinking about it over and over in my head. I already was kinda hard.
Just recently, I went over to my friend's house. I had walked in the backdoor near the laundry to find bras hanging. I was amazed and started to get hard. I thought about what had happened a few months before.
I stayed at my friend's house for awhile. When I was leaving, he was the only one home. I said good bye and I left him watching tv upstairs in his living room. I was walking toward the back door past the bras. I instantly got hard, due to my fantasy about bras, and I realized I could stand there for a few minutes with my friend not realizing.
I held one bra and just imagined it was his sister. I became so hard then. I sniffed the bra and then headed for home with the thought still in my mind. I got home and wanked off to it, and I still do today, hoping to maybe one day see this again, and also, to see his sister, a little more developed and in the the same attire.