First you need to understand that while all women have the same parts and have the potential do it, there's a scale ranging from women who are so extremely difficult it might as well be impossible, through progressively easier to squirt, to finally the naturally gifted women who will squirt with every orgasm and know no other kind. And unless you're with the latter or a girl who knows herself, you have no idea where a girl falls in the range.
Next you need to know that you have to hit a spot just forward of her G-spot (closer to her opening) that feels like a little nib, but depending on the girl, can be easy or extremely difficult to find and generally coincides with how easily she is to make squirt. But when in doubt, just rub along the top of her vagina including and forward of the G-spot and you're bound to hit it. Then you also have to find the correct pressure and rhythm to make her orgasm. Only you've still got her mind in the way.
Because most women aren't naturally gifted and don't squirt with every orgasm, they don't know the feeling that builds inside them, and may mistakenly think it's an urge to urinate. This means they fight to hold it back, when they're really holding back a powerful orgasm. So you have to get her past that by talking to her before you try it and then remind her as you’re doing it (and especially as she’s nearing orgasm) to let what ever comes come and hold nothing back. Then, once she's had a few and is more familiar with the feeling, she'll be able to squirt better and without your coaxing.
If you do manage to make her squirt, her contraction will force you out, and you wanna rub (or firmly pat, depending on the girl and even sometimes just for a change) her clit to sustain the orgasm and make her squirt even more.
Once you do find the spot (or atleast the general area), show her, and let her play with herself (including her clit to sustain it) to find out exactly the location, speed, force, and motions (and clit play) she needs to make it even better as she can feel what everything does, and then have her show you so you can do it too. Plus, it’s a great show to watch her learn as she practices on herself.
And remember, what you see in porn is not likely to be what you get, especially the first time. Depending on how well you manage to work her spot, how much liquid is in her, how unsure she is of what's happening, and exactly where she falls on the scale, you could get a trickle or you could get a squirt like a shot from a water pistol. (While larger volumes of squirt is possible the first time, it’s very unlikely everything would come together for that. However,
You Might wanna make sure you’re not on something
You Mind getting wet or put down some towels to absorb it.) But with experience for both her and you, they should come more easily and you should get more volume along with more intense, longer-lasting orgasms.
