Squirting

So me and my man has been talking about squirting. He's been wanting me to squirt but I don't know how. Like I don't know if some women can and cant. Or you just have to know yourself to be able to do it. I'm actually interested about it. So if there's any ladies out there that are able to squirt please can you explain how to trigger it and what it is basically, like the liquid and all. Thank you!!