TMI: Normal cum or squirter?

Again it's TMI but curiosity is on our minds. I'm 29 and in my husband and I's random topic discussions this came up so I thought I would ask. I understand that some women organism normally and some women squirt,,, When people refer to it as a "squirting" Is it urine or is it cum? Is there a lot of it that releases? Why does it happen this way instead of the normal way?