Possibly not the best subreddit, feel free to redirection me.

I have been banging 3 different girls in the last week.

Everything works great with two of them. With the 3rd one my mojo is far from being solid, despite her being a)by far the nicest body of the 3 and possibly the most eye-catching overall. b)just as horny as the other two if not the most aroused in my presence, and willing to let me do whatever I like with her body.

If it doesn't work it doesn't, and it's not the end of my world, but I'd like to understand what's happening here.

Wondering if -my mind is playing tricks on me ("shes too good for you") -something doesn't match at the chemical/smell/pheromone level. Shes the first middle eastern I've ever fucked. -its something in her attitude/stare . I've been raised a catholic and get really turned on by the idea of sex being a "nasty", sinful thing. This one acts the most removed from this idea, she fucks the same way she would sip a glass of fine wine. The one who really turns me on, by contrast, looks at you like satan was possessing her.

Any similar experiences, comments, ideas?