It is Female Ejaculation... (aka squirting) It can happen via clitoral or G spot orgasms. You aren't peeing!! Next time it happens, smell it (sounds gross I know but I do it every time for the same reason LOL) you will see that it doesn't smell like urine, isn't yellow either! When you are aroused, and stimulating yourself clitorally or otherwise, your G-spot swells and becomes engorged with fluid, "ejaculate"... have no fear it is normal and great!! You are lucky! Some women can't ever do this!! Just relax and enjoy!! ...and invest in some waterproof covers!!