The phrase "playing with someone's heart" is usually another way of saying that you're leading someone on or toying with their emotions. This story, however, is not about someone screwing me over..as a matter of fact, it's quite the opposite.
The heart has always been a symbol of love and romance. In this story, the heart becomes sexual...
You had told me that tonight you wanted to do a little "experiment". You wouldn't say what it was, just that I would enjoy taking part. I take a shower and get dressed, then wait for you. When you arrive, I notice that you have brought nothing with you. Curious, I ask you what kind of experiment we are doing that needs no equipment.
"You'll see," you say, and take my hand, leading me upstairs.
We get to the bedroom and you tell me to undress. I do as you say, still wondering what you have planned for me. Once all my clothes are off you have me lie on the bed, and you tie my arms above my head. This isn't unusual, since you are the one in control when we're together, and you've tied me up many times before. You remain clothed, and get onto the bed, straddling my waist. I look up at you, slightly nervous but also excited, not knowing what you have in store for me.
You look me in the eye and start to slowly run you hands lightly over my skin. I feel your fingers on my thighs, I feel you caressing my stomach moving slowly upward. You run your hands over my breasts, stopping for a moment to linger on my nipples. Your right hand slides over and stops when it gets to the spot between my breasts. I feel you press your palm against my chest and you look at me, a smile on your face.