My GF has never masturbated before because of a guy doing very bad things to her in high school, but recently she's trusted me enough to let me finger her and she apparently loves it. A few days ago she asked me to teach her how I do it so she can do it herself when were not together for weeks at a time.My question is.. how do I teach her? I can't really lend her my hand or push her fingers to show her. What's the best course of action?