I remember when I moved to Mexico and the 3rd week I was there I thought I had knocked up a local girl. What was bad for her was it was only the second time she had ever had sex. The first time she got pregnant and the guy was upper class so he just shined her on.

She said that I should just leave and she would deal with the shame on her own. I was sorely tempted to run scared but I decided to stay around and face the music. Turns out she was not pregnant and life went on. I still keep in touch with her from time to time.

Its almost impossible for a small amount of sperm to cause impregnation.

I think a lot of the highschool horror stories are of the 'really scare the kids so they don't have sex' variety. The idea being if they are scared to try oral or whatever they will be really scared to try intercourse.