Girls do cum in their own way but the girls cum is much different then a girls cum.
When a guy cums they release sperm. The sperm is what shoots into a woman's vagina and swims with the girls eggs and then that is how the girl creates a baby if it's meant to be.
Sometimes a guys sperm count can be low and not be able to make a baby with a woman.
A girls cum is more like fluid and a guys cum is more sticky and like jello.