From what I read on this matter, some women simply don’t produce as much natural lubrication as others do. Plus, there is a certain amount of girls that can’t produce that because they need to feel some attraction to the partner. Although, the pros should in theory have it ready at any time, we’re all people and everyone’s body works differently. Especially , if you take into account the fact how badly our ecology is screwed nowadays what’s with the hormones and antibiotics overuse, tons of abnormalities all around and inside of us. Just a thought.