Now that I just had a break-up and she's single too, we sometimes have sex. She has already expressed only wanting a friends with benefits type relationship and well ok. This is my ex gf Cindy from the time I was a 15 year-old HS sophomore. We lasted all the way till near our graduation and then broke up (well she did).
I don't mean to sound like a jerk but somehow with her it's the best sex ever with. I felt like a teen again. Even when I was in my other relationship (the most recent ones), sometimes I would fantasize about doing it with Cindy.