You could always start with....What's a nice girl like you doing looking for sex online??

Seriously though....it's different from one to another and what makes one wet-up on her chair may make another hang up on you....

Best way is to get them talking, get them to tell you a story of something erotic thats happened to them......then you do the same...

At least you'll both start to get some sort of "feel' for what rings each other's bell....if you get my meaning