Explore your fantasies
You could have seen hardcore scene in porn movies and pictures, where hot women are enjoying ejaculation in their face, anal sex or dirty talks. The reality is far from that for most women who are more aesthetic in their sexual tastes. Some women do have "animal sex" in their most hidden fantasies, but are afraid you will consider such desires a sign of perversity. Focus on the things she didn't dare do and convince her - you'll be glad to fulfill her most "crazy", "dirty" or "perversive fantasy.
2.Communicate
Hard sex is not a kind of encounter you can introduce suddenly or right before the session. If you really want your woman to open up to your desires, you need a careful approach and lot of communication. You can eventually mention a scene from adult movie and tell about your attitude towards it, but it would be even better if you ask your woman about her desires.
Questions like :"why do you think men like their partner to swallow?" or "Would you like to call me a ...?"are useful to know her attitude and learn a lot about your partner's preferences better.
3.Show your feelings first
Women hinder their animal instincts mostly because they think that rude actions create an impression that their partner shows his disrespect and consequently this means lack of feelings. In this case, there should be a borderline between sex and feeling meaning that your sexual urges won't change your feelings toward your partner and even improve your relationships. Put an emphasis on her sexual desires and tell that you'll enjoy the "hot action" only in case she really wants it.
4.Be patient
Women prefer to try new things only providing they trust their partner. This may require some time and patience. Pushing things forward can ruin your initiative very quickly. Introduce new elements and reveal your fantasies step by step.
5.Give her the initiative
The best way to make your hard sex fantasies true is to have sex according to her own scenario. If you see that she doesn't like your experiments or feels somehow awkward- it's better to stop and try next time with great care. Support her initiative and focus on the things you liked.
Be attentive to details- she may learn quicker than you could imagined. You won't be the one to introduce ideas next time!