I'd gone to a party with my boyfriend, Paul. As the night went on we sort of drifted apart, as most people do at parties.

I found myself talking to, Amy, a girl about my own ages. She was very, pretty in a fresh, unpretentious, sort of way. But, underneath, she was very cynical and extremely funny. I hadn't laughed so much in a long time. We really got on great.

When Paul and I were leaving I went upstairs to get our coats. As I came out of the bedroom Amy was standing right outside the door. I smiled and stood to one side to let her through. But, suddenly, she started to kiss me. Her tongue was in my mouth and her hand was up my skirt, right inside me. I was that shocked I just stood there, like a dork, a coat over each arm. Her fingers withdrew and then gave my clit a little squeeze. It was all over in seconds. As she broke free our eyes met. I was bewildered, embarrassed and turning ten different shades of red. Amy just giggled, looked me full in the face and slowly licked her fingers, pecked me on the cheek, and disappeared into the loo. Later, I found her mobile number in my coat pocket.

I've never had the hots for a girl. Neither am I lesbian or bisexual. Why is it then that I can't stop thinking about her? Why have I kept her number? And why was sex with Paul that night simply fantastic???