My girlfriend Sylvie and I lived close to a community college and many of the students passed our house each day as they went to and from the college and the popular bus and transit routes. Some mornings after we had sex, Sylvie would stand at the curtain and peer through at them, sometimes with her pussy still filled with my cum and tell me how hot some of the guys were. I paid no attention until she started to pull open the curtains while still naked and pretend to me that she forgot that the sidewalk would be busy with passing students. It still didn't bother me much as I thought how much fun it would be for them to see a naked girl on their way past in the morning.
I had become used to what I guess was her flashing these guys and sometimes girls as well and never thought about it too much, although all the time knowing she was a very horny girl with an open mind and wild sense of adventure. One morning after I had fucked her, she got back into bed with me and asked, "Would you ever let some of them fuck me?"
"Some of who?" I asked her.
She looked over at the window and the closed curtains, then gave me a little smile.
"What, those guys going to college in the morning, have them come in here and fuck you?" I said a little surprised, but also intrigued.
"Well maybe not fuck me, but I can't stop thinking about all these cocks passing our house every day, even just to see their cocks or have them cum on me, would be amazing."
"And what do I get out of it?" I asked her.
She thought for a moment and then said, "You get to see me covered in cum or maybe even have my pussy filled with cum."
She knew that this was a bit of a fantasy of mine and was playing this whole thing very well. I had always liked the idea of someone else shooting their sperm into her or onto her, but unknown to her I had even thought of eating someone else's sperm from her pussy. We had recently started to do this thing after sex, where I would delight her and myself, by going down on her after I had ejaculated inside her. It was still new to us and a huge turn on for me, frequently getting my cock rock hard again after tasting the cum between her lips. She didn't know that I would be willing to eat cum from her pussy, even if it wasn't mine, and I wasn't telling her anytime soon.