So, a study was recently conducted on women who were considered "squirters" to find out what the liquid really was, that was being released from their body. The end conclusion was that it was, in fact, urine that women squirt out, even though all women included in the test emptied out their bladders before the test. The more you know!

http://www.iflscience.com/health-and-medicine/women-squirting-during-sex-may-actually-be-peeing