I have seen lots of porn. And I have seen girls cum... and when I say cum I mean white stuff come out of their vigina.
Or can a female do that???
If what you saw was white goo slowly oozing out, that is male ejaculate.
Female ejaculation (called 'squirting') is real but it is also uncommon - maybe 5-20% can do it. In porn it is usually faked - by peeing during the scene (This is info from a porn actress that has been on Loveline radio show.)
True 'squirting' is liquid from a number of glands that are down 'there', and it is not pee.
females can most deffinatly cum.