Dirty talk?? and looks?

[Thing]

Ok

I have a good relationship with my GF but some days ago, she told me that sometimes she would like me to call her "Bitch"

that it was ok for her that i say that.

but here is te thing, I was raised by the concept of respect and honor and all that good things one can have...

and I like it i mean i like nature, justice, and be a good person, i dont say bad words too often and really i dont like it very much...

So i'm not used to call my GF the person i have feelings for, that way, is not that i treat them like queens, but i respect them and treat them as they deserve acording to the relationship...
i dont have any fantasy or anything that has to do with dirty talking or something... is not that i dont like it but i feel that if i start to call her like that in an exiting momment i think i would have a turn off... and she may turn on...

i'm telling her that we need to talk, bcuz maybe someday i'll do taht for her, but not right now... i need to prepare mentaly and feel confortable with the idea.

there's too a fear i have... normally i'm a nice guy, with good itentions and all... but as i grew up, i somehow created a part of me thats all perverted and sensual and horny and all that,
but my anger and some bad emotions are there too...
i fear that i can get carried and exagerate a phrase or a feeling, or become one of those guys that leave the girl when they get tired of her....

so... i think that talking is the solution... like everyone says communication is the key... i know... but still.. i feel like.. sad or depressed bcause i cant please her in that way.

other thing.... somtimes we start the action.. by touching and kissing each other.. lets say int the livingroom. and it gets really exiting and hot and all perfect... but then someone calls her and we notice that i have to go home bcause of the time..
so we look each other and i treat her softly, i mean caresing her face and giving her a " i love u " look or something like that.. and she freaks out because is a Complete change.. From Hot passion and sensual to a cute and normal look because i want to show her that i like being with her not just for sexual interest.

lol i got carried away... please gve me a hint or two.. is not life or death, but i can help me relax my mind.