So is it like a given that there is sperm in pre-ejaculation... and it truly is a given, how effective is that in pregnancy? like is the sperm that sperm weaker... i just would like to be more educated in with sex here... because my bf and I do not use protection, he always just pulls out, he doesn't ejaculate even a drop inside of me but I do know that there is such thing as pre ejaculation... i just want to know, if there really are "swimmers" there... thank you 