(((Tree)))
I struggled for a long time before I could discuss sex. It was a topic that was impossible for me to bring up but eventually it got to the point where it was like "the elephant in the room." So I just tackled it head on. When we finally ended that session I was so relieved!
I don't think the reason it didn't come up has to one or the other. It could be a combination of both of those things you mentioned and other factors as well. You will discuss it when you can. Good work!