There is a difference between an orgasm and squirting, an orgasm is when a woman achieves intense pleasure from love making, she will will sometimes call out , her face and the area from her neck to her breasts can go red in colour, I had one girl friend who use to almost pass out with pleasure.
The squirting is as a result of the orgasm and is fluid from the Bartholomews glands in the vagina which help provide lubrication, some girls provide a lot of lubrication naturally and others have to use perhaps KY Jelly.
The water is not urine and if you partner orgasms when you arousing her orally it will do you no harm at all if you swallow some, it is said the taste of a vagina beats the best champagne.
Techniques? more woman reach orgasm though masturbatuon and orall sex than intercourse or if they orgasm both ways great, is you are having oral sex with your partner which is your tounge is caressing her clitoris and her labia gently insert you index finger in to her vagina up to the second joint of the finger and in the front wall of the vagina you will fill a slightly raised and rougher area of skin.
This her G spot if you caress that while performing oral sex there is not any reason she should not have an orgasm and while she is having carry on carressing she may well have more.
One final thing not all woman will produce this extra lubrication while having an orgasm so it is quite normal if you partner does not, so go on and enjoy yourselves.