Can you get pregnant without having sex?

If semen present: To get pregnant sperm from a man has to get to the egg from a woman. If sperm is spilled on or near the vagina and it manages to get inside the vagina the pregnancy is possible.

Technically yes: If you choose to use assisted reproductive methods- artificial insemination or in vitro yes you can. But if you mean by traditional methods- you can only get pregnant if sperm enters the vagina. So if you don't want to get stds or pregnant keep the penis and vagina completely separated.

Yes: Any way that viable semen enters your vagina near when you ovulate can cause pregnancy. For example if you get sperm on your hand/fingers and then insert them into your vagina, you could get pregnant, etc.