You can also tell that a person isn't ready to have a conversation about intimacy if you haven't met yet, and you're just talking and texting with them on the phone. If that sounds like you, then you definitely need to tone it down a bit. Many times people mistake "bedroom eyes" or sexy cat eyes for an opening to an erotic conversation early on, but that's not always the case. Sometimes, it's something that a person naturally appears to have when they drink a little wine or if they're very attracted to you. It's important to be patient, especially when someone has the power to draw you in with their bedroom eyes. That's usually a sign of great chemistry and it's likely that the person is worth the wait. There's no need to rush the conversation.
I don't think that there has to be a conversation about intimacy at all early on. I believe that people can have that conversation after being intimate. That way, you can see what this person is all about, without them using their past experiences from what they've experienced, heard, or seen, as a comparison. Maybe this person you're about to date will blow everybody else you've dated out of the park. As well, if this turns out to be the person that you're meant to be with, nothing could ever compare.