When you pursue a woman, you can do it in a way that makes the interaction clearly about a one-off night of sex or in a way that makes your intentions clear that you are pursuing something more than that.
What confuses women (and often the guy seducing her) is when he gives her the signals that he thinks of her as girlfriend material when in fact he's only thinking of pumping and dumping her. If he does this, she often feels used, manipulated, and so on. Also, for newer DJs, something similar can happen: "When, I banged her and now she's angry because I refuse to giver her a relationship." Well, of course she is, given you gave her every indication that your intentions were more than just sex.
Girls are not fragile little flowers.
If you pursue a woman just for sex and do it in a way where she knows that's what is up, she can decide whether she's on board or not. Very many are, if turned on enough.
And you can pursue a woman in a way that gets across the idea that you are interested in more than just quick sex but rather would like to date her on the regular.
All that said, don't get me wrong, if you want to pursue sex by giving women the impression you are pursuing a relationship, go for it. That often works to get the lay as well, but just don't be surprised when they react negatively afterward when they realized you are not gonna girlfriend them up. That's a predictable reaction, one guys have as well when women do the same thing.
One situation, though, I have found myself in sometimes is when I am willing to date a woman and pursue something more than just a few bouts of sex and then after a few dates/bangs, I pull back a little to make her do some work. That is, does she expect me to do ALL THE CALLING and ALL THE SETTING UP OF MUTUALLY FREE DAYS TO GO OUT and therefore ALL THE CHASING? Well, when that happens, I sometimes fade away. I'm willing to make the plans, but she should call and see when I'm free once in a while, especially if she has a busy schedule. Women's entitlement complex tells them they have to do NO INVESTMENT beyond showing up and spreading. I think that's the wrong frame to continue to pursue. It puts you in needy chump mode. So, there's been times where there's been women I'd like to see more than a few times but didn't because she did not put in any work whatsoever to move things forward. When that happens, it APPEARS TO HER that I pumped and dumped her when in fact she undermined my own interest by expecting me to be beholding her to golden vagina while showing me too little mutual pursuit.
Anyway, I hope this helps you with your question.