I'm a squirter, newly so (past couple of years). I had never squirt and thought it was only possible with select women, of which I wasn't one. I only orgasmed clitorally with a vibrator. After becoming a hotwife a couple of years ago, a BBC was fucking then fingering me repeatedly and FAST, fast cock thrusts followed quickly by fast fingering, and I felt something strange happening. It felt weird to me. I didn't have the sensation that I had to pee or that I was going to let loose any liquid, and I didn't have the sensation I was climaxing in the way a clitoral orgasm feels. Then liquid started shooting out. Not porn style with a giant firehose stream, but plenty enough to soak me and the bed and, in conjunction with his hand movements, splash all over. I wasn't sure what to think. It felt seriously different. I was worried I had somehow pee'd.
My husband coincidentally arrived at the hotel room a few minutes later and I told him what happened. He was disappointed he'd missed it, so the BBC asked if we wanted him to do it again. We both said yes and he did it again. That's when I learned it was repeatable. Yay.
Since then I've learned that I squirt if I've first been fucked by a nice cock for a bit to get me really aroused, and then a cock or a finger (cock greatly preferred) fast pounds *upward* towards my g-spot with 7" or more. After about 3 minutes I'll build to a seriously strong climax and squirt. I've drank water and beverages to increase the volume just for the fun of it, but it seems that, for me at least, the only thing that generates a larger volume is if I first ******* Shock Top (maybe any beer, but I don't really care for beer, Shock Top being the best of the not-greats).
Two things to note:
1) The cock or finger should go upward (or if doggy or the guy is laying on my back, very pointedly downward) and be hard and stiff. No bend or inward curl needed, as the entire area there becomes sensitive to repeated pushes.
2) Fingering done wrong HURTS. I don't like letting guys finger me because so many do it wrong. Fingers must be lubricated! My wetness, if prolific, is fine, otherwise put on lube. Fingers must be clean. Goes without saying. Fingers must NOT HAVE NAILS. Trim the nails or don't put them in.