Is it normal that a woman isn't as responsive to the same things?
So I recently started sleeping with this woman, and the first time we were together, I managed to get her off with oral. There were a couple specific things that I did for a long time in order to do that, and they worked to get her going the other times we were together. However, the last time, she wasn't nearly as responsive to ANYTHING I did, especially when it came to oral. She even told me that what I was doing to her back tickled, despite it being the exact thing that I did previously that felt SO good for her.
I know that there is such thing as disappointing sex, but is it really normal to have such a fluctuation in her pleasure? I'm kind of upset that, out of the last 3 times we've been together, I haven't been able to get her off despite experimenting and then going back to tried-and-true stuff when that experimentation fails. Am I just overthinking it? I care a lot about how she feels.