Answer:
For pregnancy to occur there has to be an ejaculation by the male that leads to sperm being released into the vagina of the female. after that sperm are able to swim to the ovum fertilizing it. the more sperm in the vagina the greater the chance of pregnancy.
HOWEVER while the chances are not as high it is still possible to get pregnant from genital to genital contact if there is any ejaculation which can contain sperm and can it gets anywhere on around the vagina lips. use a condom even if you're not planning to penetrate