In my younger years.
I have always enjoyed discreetly exposing myself to young ladies especially when they think I don't know they are watching. One day I was up to one of my tricks and I got a real surprise.
At the age of twenty I was six feet tall, in good physical shape with blonde hair, blue eyes, a cut seven inch fully erect cock with rather large testicles. Jennifer was my sixteen year old neighbor that loved to flirt and tease with me about everything and anything. Jen had blonde hair, large beautiful round breasts, pencil eraser nipples and a nice petite figure. She lived with her mom in the apartment across the hall from me (Jen's bedroom window was straight across from mine).
One hot summer day I came home from work and saw Jen sitting on the stairwell wearing a tube top and a pair of tight shredded blue jean shorts. I said 'hi' as I passed by into my apartment and settled in by stripping down to my boxers and grabbing a soda from the fridge. Out of the corner of my eye I saw someone peeking in my living room window. I pretended not to notice but I could clearly see that it was Jen. I started to get aroused and decided to play along and give Jen a little show. I stood up to pull down my shorts when someone knocked at my door. It was Jen. When I opened the door she stepped in, checked out my bulge, shut the door behind her and locked it. There I was standing in my living room wearing nothing but boxers, with a tent pole sticking out and wondering what will happen next. She giggled and asked me if I wanted to 'fool around a little bit', and before I could say anything she pulled off her tube top exposing her firm supple tits. She leaned in and pressed them against me as we began making out. She then pulled down my boxers to relieve my aching cock and played with it and my balls as we kissed. I rubbed my cock against her stomach, pressing it in hard against her skin as we continued kissing and petting. After several minutes of feeling each other out and sucking on her neck and nipples we agreed to not have intercourse but to continue playing and see what happens. Jen was very sexually aggressive for her age and asked if she could jack me off and watch me cum. More than willing to oblige I moved so she could stand behind me. She reached around with her soft hands and grabbed my cock, pressing her tits into my back, and began stroking while she whispered nasty things in my ear (this girl was really good). Within minutes I unloaded a huge wad of cum all over the couch, carpet and her hand. She had a smile on her face and seemed so excited to do this for me. We then went into the bathroom to clean up and I invited her to take a shower with me. As she removed her shorts she revealed her sweet little shaven (V-shaped) bush with a sexy little mole on her right pussy lip (oh how I loved that mole!).
I told her it was my turn to do 'something' for her and she agreed but she wanted me to do it her way (she wanted to watch). She then climbed into the bathroom sink, faced the mirror, spread her legs apart and instructed me to stand behind her. I kissed her neck, massaged her tits, tweaked her nipples and worked my way down to her wet little pussy. As I massaged her pussy with both hands, rubbing up and down on her slit I could see that she really liked when I touched her clit. Slowly, I worked my fingers in and out of her pussy as I pressed my thumb down hard on her clit. She began breathing heavy and started to moan as I concentrated on massaging her clit in a rapid circular motion. Within minutes she threw her head back and thrust her hips forward sending her into a wild and uncontrollable orgasm. Watching in the mirror was so exciting for me. I believe I did a better job of getting her off because I could see what was going on; I could read her every move and adjust what I was doing to satisfy her.
Jen got dressed, and went back to her apartment before her mom got home from work. Later on she confessed that she used to watch me from her bedroom window as I walked around naked and masturbated. I had many sexual experiences with Jen and her friends, but I will save those for another contribution.