Research shows that squirting is related to glands in the urethral sponge, which is embedded in the vaginal walls along the sides of the urethra. These glands, called Skene's glands, are part of the urination process.
So, if squirting is associated with the urethra, surely it’s pee?
Well, no! Researchers have looked at the chemical composition of female ejaculate (squirt) and found some chemicals that are in urine as well as a prostate‐specific antigen. This is a chemical found in semen, which has established the reference to "female ejaculation."
There’s still a question about where this fluid reservoir is held. The theory is the bladder but the function of the ejaculate and urine are two separate things.
There may be an involuntary release of small amounts of urine while squirting, creating a mixture of fluids. The amount of urine depends on when the person peed last and how hydrated they are.
Let’s look at things this way: A penis owner ejaculates and urinates from the same opening, however, we don’t consider ejaculate to be pee so squirting should be considered in the same way.