Why don't girls ask questions in return?

Anonymous
So I have been on dating sites for a while now, and there is one thing that I have found to be strangely consistent with the women I have talked to. When I ask a question about them or their interests, I get an answer back which is great but only the answer. I have yet to talk to a women that has asked any questions about me in return. I'm not rude, inconsiderate, or self obsessed, I am genuinely interested about knowing more about them and seeing if we have common interests. Generally I would consider a conversation of that nature to be reciprocal especially in this context. I tend to think that if a lady replies a few times (passing the politeness threshold of course) That she has even a small amount of interest in me, but I could be wrong. I don't think, it's necessarily them being rude, but more to the idea that maybe somehow it has become expected in online dating society for the guy to make the main effort and maintain the conversation. (Strictly speaking in terms of man messages girl)

I'm simply curious what other women have to say on this topic, do you consider this strange as well or completely normal. And guys It would be good to hear if you have any similar stories or experience the same thing.
Why don't girls ask questions in return?
6 Opinion