This is a difficult question to articulate. Regularly I read or hear females say that they have been 'horny all day' - or something to that effect. But I often wonder how that starts for a female. For a guy, we may feel a sensation that our cocks are a little heavier or swollen and they feel more sensitive. Then from there the obvious reaction occurs. Our mind wanders, our cocks get hard, etc. So what is the initial stage for a female that alerts her and she realises that it is one of those moments when she is starting to get aroused. That it will be one of those days when she may need to 'take care of things'. Is there a sensation in the vagina preceding lubrication? A feeling in the abdomen? Increased temperature? What is it? I assume that -as with men - women do not necessarily need some physical, visual or aural stimuli. That there are occasions when you 'just get the feeling starting'? I hope that I have explained things - but probably not!