ok....im on bc pills and my bf and i are both clean of STI's i was woundering what the risk of pregnancy would be if we were to have sex without a condom for only like a minute or so then put on a condom way before he reached orgasm....so he didnt ejaculate in me. i know pre cum has sperm in it....but it is something we are thinking about....so i would just like to know the risk....and also if we coupled BC pills, pull out with in like a minute, spermacide and the sponge....would that be a highly effective method to prevent pregnancy?.....STI's are not of concern....we are in a longterm monagamus relationship and are both clean