Sexually aroused discharge looks like water. Other discharge varies on ur cycle day. Close to ovulation it becomes like egg white. Before and after that it looks like creamy with milky or yellow color.
Women have about a half teaspoon of discharge every day. If they are sexually aroused, they have more, and it is in response to feeling sexy. So if the woman in question is just having a normal day, it's probably not that she is walking around feeling sexy, it's just her body doing its usual self-cleansing thing.