Thank you so much for your advice and also sharing your experience!

After trying out dating sites, I came into a conclusion today that they're not for me. I am happy for the people who have found their happiness in them and I'm trying to dismiss them completely because they work for some. But they clearly didn't work for me (or I just don't have enough patience).

I also don't understand their need to talk for a bit before twisting the subject about sex. Why do they spend wasting their own time like this? Make it obvious from the first message of what are your intentions so we both know what to expect from each other. Sadly, this also happened to me and I would often end up ignoring them instead of saying because I feel like that if I were to continue a conversation - they'd think that I am somewhat interested just acting like an ice queen.

You mention, "but I always felt a bit used when they immediately jumped from 'hi' to 'can I stick it in?'" actually same here! Like it makes me feel a bit.. dirty inside even if I know that it's online and that's not what they tell me eye-to-eye? I don't know how else to explain that feeling in other words but it's nauseating.