how can i change the conversation from boring to sexual and make her enjoy it?

help please!

So many ways you'd have to base your approach off her level of interest and her personality.

Some girls will respond well to "this is boring, what's your favorite position?" for example.

Other girls you will need to "date" them. If you are just looking for easy sex, there are plenty on POF who will provide that.

im presently talking to 3 different girls, which ever i like best and can get will be the lucky one.

the first one is really quiet, she wont talk unless u open her first, shes smart, honest and tries to be nice even considering that i bore her with my topics, she's asian and well mannered, how should i approach her to get her attracted to me?

the second one is mexican, she seems like a party kinda girl and has lots of guys over her, she seems horny because i get better response from her when im making sexual statements. the first time we talk i got her number and did horrible when texting her, she give me her # because she only wants to be friends, but i just wanna hit it and quit it, how do i approach her?

the other one is a white girl, we were talking about some new movie coming to theaters and she seems really interested in talking to me, few seconds later we were suppose to get books to work with and there was no more, she wanted me to work with her at first but i left me seat and came back, she started to be cold to me, im not sure y, i didnt see her talking to any other guys or anything.

im basically asking how to bring out the sexual drive in all girls.