I think the best way for a girl to be ready is to touch her on the right places, the myth of the "G spot" is actually true, all of us have that magic buttom located downthere somewhere, also let her imagine how hot of a time she is about to face, talk to her a bit naughty. I also like some added "accessories" in the bedroom to spice up the moment.

Send this to her and she'll be dripping for you on demand.

If we have something exciting planned - no fore-play is needed.  I have been fantasizing about it and masturbating to different fantasies days before the main event.  

If he is particularly Dominant - no fore-play is needed.  I am wet the moment the restraints touch me or he has pushed me to my knees.

If I am giving a particularly good BJ - the visual of watching him melt is all I need.

Outside of that - yep, I am going to need a little assistance to get going.  

I am sure all of us are different.  But for me the mental stimulation is far more erotic and gets me going the fastest.  

....i can be stimulated purely by the physical. In a perfect scenario there is some dirty talking to go along with the physical

I would suspect that most women have experienced getting wet through mental stimulation alone just as about 99.99% of us guys have gotten erect the same way.

Mental can definitely get the panties wet!

But physical stimulation sure puts the icing on the cake

Its all mental and visual

They get wet when they see an envelope or handful of bengis