basically the only thing i know is if any sperm comes in contact with a girls vagina she is liable to become pregnant? yes/no?
well if you are having sex without a condom and you never ejaculate(and your the guy) is it possible for the girl to get pregnant? and how if yes
if you are having sex without a condom and you do ejaculate, but before you do you pull it out and do it on her chest, and none of it touches her vagina, and you are done with sex for the night and you thoroughly washed your penis before you had sex, is it possible for her to get pregnant? and how if yes
for my own good
and what are some other good techniques?