Fantasies you can make Happen

Sex in Public

What's stopping her: She doesn't want to feel skanky.
Have it granted: Being groped on a park bench is a little too public, but few women would decline a quickie on the roof of a tall building after dark. Heights trigger dopamine, making most women more willing to take risks. Sparkling city lights, blustery wind and stars overhead make a woman feel both glamorous and horny.

Make Dirty Movies

What's stopping her: Hello, what if someone found it?
Have it granted: Ask her if you can film close-ups of her body, in soft lighting, from the neck down to ensure anonymity. Show her how beautiful she is. Do it again, this time with one hand touching her.

S&M
    
What's stopping her: Tacky whips and handcuffs.
Have it granted: Peel off her clothes, then take off your tie and knot it around her neck. She'll realize that a silk loop around her neck feels surprisingly erotic. Use it to pull her in gently for a kiss. Then, when she's on top, give it a firmer tug. She'll either shoot you a look of reproach or growl and pinch your nipples.

Doing it Online

What's stopping her: It's impersonal.
Have it granted: It's too much to expect her to strip and dance for you in front of a webcam on the first go. A better idea is to start off gently, by sending her a mildly naughty SMS (‘What are you wearing?’ is universal code for ‘I'm thinking sexy thoughts about you’), raunching up the language and suggestiveness if she responds in kind. Don't be scared to talk dirty - it might sound silly when you do it in person, but it's very effective when done in a text. Ask her to touch herself and tell her you're doing the same. When it becomes awkward to do this and text at the same time, suggest taking the game online.