Squirting is a form of ejaculation where a white-ish or clear fluid is released from the vulva during sexual pleasure or orgasm. There is some debate about where exactly this fluid comes from. It's generally believed to be fluid released from the Skene's glands, a set of glands located near the urethral sponge, when the surrounding erectile tissue is stimulated. It's also possible that squirting is released through the urethra itself or through the vaginal opening. The most important thing is that it can feel really good, and that pleasure is what really matters here.