When my sister asked me to swap bodys so I could do her math 101 final for her, I reluctantly agreed. I was a senior, about to graduate with a bachelors degree in math, so I figured the least I could do was help out my sister. In the uniform I had to wear for her private university, I went to the classroom and completed the test for her. Easy peasy.
On my way out however, I ran into her boyfriend, who unfortunately found the womens uniform incredibly sexy. He pulled me into a side-room, and before I could even refuse he pulled off my shirt, bra, and panties, and pulled me on top of him on the table. Despite the fact my mind was in her body, seeing his cock made my new pussy incredibly wet, and as he inserted into me I felt an immense wave of pleasure. My tits bounced up and down as I rode his cock, enjoying every second.
I doubt I'll be telling my sister about what happened after her test. But maybe the perfect score I got her will make her want to swap bodies again. And hopefully if we do I'll run into her boyfriend.